List ofStar Trekaliens

Star Trekis ascience fictionmedia franchise that began withGene Roddenberry's launch of theoriginalStar Trektelevision seriesin 1966. Its success led to numerous films, novels, comics, andspinoff series.A major motif of the franchise involves encounters with various alien races throughout the galaxy. These fictional alien races are listed here.

NotableStar Trekraces includeVulcans,Klingons,and theBorg.Some aspects of these fictional races became well known in Americanpop culture,such as theVulcan saluteand the Borg phrase, "Resistance is futile."

Star Trekalienshave been featured inTimemagazine,which described how they are essential to the franchise's narrative.

Key

Abbreviation	Title	Date(s)	Medium
TC	"The Cage"(Star Trek: The Original Series)	1966	TV
TOS	Star Trek: The Original Series	1966–1969	TV
TAS	Star Trek: The Animated Series	1973–1974	TV
TMP	Star Trek: The Motion Picture	1979	film
TWOK	Star Trek II: The Wrath of Khan	1982	film
TSFS	Star Trek III: The Search for Spock	1984	film
TVH	Star Trek IV: The Voyage Home	1986	film
TFF	Star Trek V: The Final Frontier	1989	film
TUC	Star Trek VI: The Undiscovered Country	1991	film
TNG	Star Trek: The Next Generation	1987–1994	TV
DS9	Star Trek: Deep Space Nine	1993–1999	TV
GEN	Star Trek Generations	1994	film
VOY	Star Trek: Voyager	1995–2001	TV
FC	Star Trek: First Contact	1996	film
INS	Star Trek: Insurrection	1998	film
NEM	Star Trek: Nemesis	2002	film
ENT	Star Trek: Enterprise	2001–2005	TV
ST09	Star Trek(2009)	2009	film
STID	Star Trek Into Darkness	2013	film
STB	Star Trek Beyond	2016	film
DSC	Star Trek: Discovery	2017–present	TV
SHO	Star Trek: Short Treks	2018–2020	TV
PIC	Star Trek: Picard	2020–2023	TV
LOW	Star Trek: Lower Decks	2020–present	TV
PRO	Star Trek: Prodigy	2021–present	TV
SNW	Star Trek: Strange New Worlds	2022–present	TV

A

Race	Description	Episodes (M = mention only)
Aenar	Andoria,Alpha Quadrant	"United"(ENT)," Strange New Worlds "(SNW)
	Aenar,along with theAndorians,inhabit the world ofAndoria.In many regards, they are similar to theAndoriansin physical appearance. Unlike the Andorians, their skin is light blue/white, they are almost blind, and they have powerful telepathic abilities. Aenar are pacifistic and do not use their mind-reading abilities against the will of another individual. Their blindness does not appear to hinder their abilities. Aenar government has little structure; leaders of Aenar society are chosen as the need arises, usually when contact with outsiders is called for. The Aenar are generally considered a differentethnicityof the Andorian race, not a separate species. The Aenar population is about 11,000 in size, and they inhabit the polar region of their world. Shran's daughter, Talla, from "These Are the Voyages..."(ENT), is a mixed-race individual of Andorian and Aenar origin and greenish in color, as is the Andorian inStar Trek: The Next Generation.
Andorian	Andoria,Alpha Quadrant	"Journey to Babel"(TOS),"United"(ENT)
	Main article:Andorian Andoriansare a humanoid species with blue skin and antennae. They consider themselves a warrior race, contrasting with the pacifist Aenar. They are native to the moon Andoria, which orbits the planet Andor. They were a founding member of theUnited Federation of Planets.
Angosian		"The Hunted"(TNG)
	Usually considered non-violent,Angosianauthorities were responsible forgeneticallyandchemicallyengineering soldiers to fight in their Tarsian Wars. Such process was irreversible, and the 'super soldiers' were considered outcasts and criminals that could not coexist alongside the normal population of Angosian society. As such, they were forced to be permanently confined to a penal settlement on an Angosian moon. A non-canon novel trilogy,Star Trek: The Q Continuum,shows that the Angosians have had some success in later efforts to reintegrate the soldiers, as one now serves on theEnterprise-E.
Antedean	Antede III	"Manhunt"(TNG)
	TheAntedeansfrom Antede III is an ichthyohumanoid species that resemble fish with a strong distaste for space flight. Although the Antedeans are a space-going race, space travel is quite traumatic. For individuals to deal with this problem, they induce a catatonic state while in space flight. To awaken from this state takes several hours. Once awakened from this sleep, Antedeans are generally greedy and eat large portions ofvermicula. The Antedean race is divided over whether membership in the Federation is good.
Arcadian		Star Trek IV: The Voyage Home
	Arcadianshave large, round, doll-like heads and have hair on the left and right sides of their heads with none in the middle. They are a member of theUnited Federation of Planetswith a representative on the Federation Council. They joined at least as early as the 2280s.
Arcturian	Arcturus	Star Trek: The Motion Picture
	Arcturiansare known for theirclones,which have the appearance of melted skin and hail from the densely populated world Arcturus. Nothing has been revealed about them in dialogue, so their backstory (by Fred Phillips and Robert Fletcher) is considered semi-canon.
Axanar		"Fight or Flight"(ENT),"Whom Gods Destroy"(TOS)M
	The 'Axanarare the first extraterrestrial race befriended by Earth people aboard the NX-01Enterprise. One of James T. Kirk's earliest commendations is the Palm Leaf of Axanar Peace Mission, following the Battle of Axanar; However, the exact nature of the conflict is unrevealed; it is revealed in the episode "Whom Gods Destroy"thatStarfleetCaptainGarth of Izarachieved a great victory on behalf of the Federation, and his strategies became required reading atStarfleet Academy(since Kirk himself studied these strategies, the Battle of Axanar must thus have occurred well before Kirk entered Starfleet Academy in 2250, which was itself almost 20 years before "Whom Gods Destroy" ). Kirk claims that the Axanar Peace Mission "topped [Garth's victory] with a greater one" and preserved the civilization that madeSpockand himself "brothers," implying that the mission may have contributed to healing a severe rift in the Federation at that time.

B

Race	Home planet	Episodes (M = mention only)
	Description
Bajoran	Bajor(M-class)	"Ensign Ro"(TNG) "Emissary"(DS9)
	Main article:Bajoran The Bajorans are a humanoid species with characteristic nose creases. They live on the planet Bajor. They are deeply spiritual people who worship The Prophets. They are enemies of theCardassians,who occupied Bajor and treated the Bajorans as enslaved in the early 24th century. Time Magazine called the Bajorans "a proud people struggling to recover from another species's hostile occupation of their world."
Ba'ku	Unknown,The Briar Patch	Star Trek: Insurrection
	For broader coverage of this topic, seeStar Trek: Insurrection § Plot. The Ba'ku people were atechnologicallyadvancedhumanoidcivilization. In the early 21st century, the race developed the means of building weapons of mass destruction and was on the brink of self-annihilation. A small enlightened group of the Ba'ku people escaped this horror and found an isolated planet. This group of Ba'ku followed a simple way of life and disdained the use of technology. (As shown in the filmStar Trek: Insurrection,however, the Ba'ku still possessed some form of technology and the ability to use it in emergencies since they had attempted to repair the damagedData.) At first, the Ba'ku were unaware of the metaphasicradiationin the planet's rings, which caused their aging process to decelerate significantly, although it was later discovered and cherished. The Ba'ku society consisted of strong bonds between individuals, as fewer than a thousand lived in a village. Their more straightforward way of life eventually prompted some of the younger Ba'ku villagers – who wanted to explore the galaxy with off-landers – to rebel against their elders, and an attempt was made to take over the village. When they were unsuccessful, they were exiled and eventually became theSon'apeople. In 2375, peace on the Ba'ku planet was restored, and several members of the Son'a returned to their families.
Bandi	Deneb IV, fourth planet in theAlpha Cygnisystem	"Encounter at Farpoint"(TNG)
	The Bandi are a humanoid species native to the planet Deneb IV in theAlpha Quadrant.The Bandi applied to theUnited Federation of Planetsfor membership in 2364 but were rejected because they had captured and enslaved an alien life form. Perhaps purely by coincidence, "Bandi" was the name of a vaguelyursineempathic parasite in an earlyStar Trekstory premise byDavid Gerrold,who was involved in the development ofStar Trek: The Next Generationand novelized "Encounter at Farpoint."
Ba'ul	Kaminar	"The Sound of Thunder" (DSC)
	Ba'ul are a race who use their technological superiority to feast upon the Kelpien people.
Berellian	Unknown	"Redemption"(TNG)M
	When Lieutenant CommanderDatatakes temporary command of the USSSutherlandduring theKlingonCivil War, his first officer on theSutherland,Lieutenant Commander Thomas Hobson, argues that, as an android, Data is out of place commanding a Federation starship. Hobson compares the presumed incompatibility of Data's nature and his assigned duty (or function) as a Starfleet commander to that presented by a hypothesized Klingon counselor or Berellian engineer; "they're just not suited for those positions."
Benzite	Benzar	"Coming of Age","A Matter of Honor"(TNG)
	Benzites are a humanoid race from the planet Benzar, a member of theUnited Federation of Planets. Benzites possess smooth, hairless skin; they may range in color from bluish-purple to green-blue. A thick protrusion of the Benzite skull extends down over the face, displaying a prominent nasal lobe and brow. Two fish-likebarbelsdroop down from above the upper lip. Benzites are highly resistant to poisons and other harmful substances. They can digest and derive nutrition from almost any organic compound. All Benzites from the same geostructure are physically similar, so much so that they are indistinguishable by non-Benzites.
Betazoid	Betazed	"Encounter at Farpoint"(TNG) "Tin Man" "Caretaker"(VOY) "Empathological Fallacies" (LOW)
	The Betazoid are a humanoid species originating from the planet Betazed, a member of theUnited Federation of Planets.They are telepathic.Star Trek: The Next Generationfeatures CounsellorDeanna Troi,a half-Betazoid half-human, as a prominent cast member and part of the bridge crew. She is featured in almost all TNG episodes and movies, and several episodes focus on the Betazoid people. These include shows with her mother,Lwaxana Troi.Her romantic interests, family, and personal life are plot elements in manyStar Trek: The Next Generationepisodes throughout the series. Episodes usually feature Troi using her telepathic abilities to help the crew better understand enemies and allies. Customs:The wordImzadi,meaning 'Beloved,' is often used between a Betazoid and their partner, whether they are of the same species or not. Betazoid weddings are conducted with the bride, groom, and several participants completely naked. The newlyweds possibly remain so for the duration of the honeymoon (TNG episode "Haven," novelThe Persistence of Memory). A Betazoid woman's sex drive quadruples (at the least) when she reaches a certain age (TNG episode "Manhunt" ).
Bolian	Bolarus IX	"Conspiracy"(TNG) "Emissary"(DS9) "Caretaker"(VOY)
	Bolians are humanoids with blue skin and a small ridge running from the back of their heads to their noses. They were named after a regularStar Trekdirector,Cliff Bole.As anin-joke,there have been references to the "Cliffs of Bole" on their planet.Neelixremarks that malfunctioning toilets will mainly affect the Bolians. During medical examinations, 24th-century doctors commonly ask if a human patient has had sexual relations with a Bolian. The Bolian world has been an active member of theFederationsince 2320. Aside from contributing to the ranks ofStarfleet,they have a delegation within theDiplomatic Corps.In 2366, the Bolian government was maintaining an uneasy truce with theMoropa(TNG:"Allegiance"). The Bolians are known to make crystal steel that is highly prized. They also own and operate the famous Bank of Bolius. In 2373, the Bolian government authorized theFerengiGaming Commissionto manage their gambling emporiums. During the Bolian Middle Ages, the Bolians developed the medicalphilosophyknown as the "Double Effect Principle"abouteuthanasia.This form of assisted suicide states that while euthanasia has the effect of relieving suffering, it also has the effect of causing death. Bolian marriages often involve more than two members. Any additional spouse is referred to as a "co-husband" or "co-wife." Bolianbluesis a highly appreciated musical genre among Federation species.
Borg	Unknown	"Q Who?"(TNG) "The Best of Both Worlds"(TNG) "I, Borg"(TNG) "Descent." (TNG) "Scorpion" (VOY) "Unimatrix Zero"(VOY)"Endgame"(VOY) "Regeneration"(ENT) Star Trek: First Contact
	Main article:Borg (Star Trek) While encountered in theEnterpriseepisode "Regeneration,"the Borg, a pseudo-species of cybernetically enhanced individuals, were not fully identified as the single greatest threat to the Federation until the events of TheNext Generationepisode "Q Who?". The Borg were discovered to be a group without individuality, where every member is a part of a collective consciousness in an attempt to achieve perfection. They assimilate any species they come into contact with for either biological aspects (for example, Talaxians would be incorporated for their dense physical structure, helpful in producing solid and resilient drones) or technological aspects (a species that has developed advanced engines or weaponry would be a sufficiently desirable target for assimilation) all in an attempt to improve further the overall perfection of the Borg as a whole. The Borg have encountered and assimilated thousands of species, quantity most notable by their designation of Species 8472, although more may have been added to the total since that encounter. The Borg are not a species but a collection of species. In their assimilated state, most races are altered or augmented with cybernetic enhancements that make them all look similar or instantly identifiable as Borg, making them a pseudo-species. Encounters with the Borg have varied in type, from the disastrous defense of the Wolf 359 system ( "The Best of Both Worlds"), in which many Federation ships were lost, the successful repelling of two Borg cubes from Sector 001 on two separate occasions ("The Best of Both Worlds""Star Trek: First Contact") and the infiltration, usage of and destruction of a Borg transwarp hub (a critical part of their interstellar menace) by the USS Voyager ("Endgame").
Breen	Breen, Alpha Quadrant	"Season 7 (1998–99)"(DS9) "Trusted Sources" (LOW)
	Main article:Breen (Star Trek) The Breen are a mysterious race who joined theDominionduring theDominion War.
Brikar	Unknown	Season 1(PROD)
	Brikar are a large, rock-like species.First-known examples are both young: 8-year-old Rok-Tahk fromStar Trek: Prodigy,and young adultZak Kebronfrom theStar Trek: New Frontierseries of novels. According to the novelization, Brikar experience puberty later than humans.

C

Race	Home planet	Episodes (M = mention only)
	Description
Cardassian	Cardassia Prime, Alpha Quadrant	Introduced in "The Wounded"(TNG);many TNG/DS9/VOY appearances.
	Main article:Cardassian The Cardassians are enemies of the United Federation of Planets and are mentioned inStar Trek: Deep Space Nine,Star Trek: The Next Generation,andStar Trek: Voyager.They have noticeable ridges along their foreheads and necks and a crest on their foreheads, earning them the nickname, Spoonheads. Their government is a military dictatorship. Production design: Their makeup design was done by Michael Westmore, and their costumes by Robert Blackman. Major Cardassian characters:Garak,Gul Dukat.
Changeling	Unknown, Gamma Quadrant	"The Next Generation".(PIC).Season 3. Episode 1."Disengage".(PIC).Season 3. Episode 2."Seventeen Seconds".(PIC).Season 3. Episode 3."No Win Scenario".(PIC).Season 3. Episode 4.Odo,Seasons 1–7 (DS9)
	A race of fluid shapeshifters,who founded theDominionby genetically engineering organisms to operate the military and logistics. These organisms call their rulers the Founders, who refer to most humanoid species as "solids."

D

Race	Home planet	Episodes (M = mention only)
	Description
Deltan	Unknown	Star Trek: The Motion Picture(TOS)
	Humanoids from Delta IV. They are assumed to have superior attraction characteristics. For them to serve in Starfleet, an oath of celibacy must be recorded in Star Fleet records.
Denobulan	Denobula, Alpha Quadrant	"Broken Bow"(ENT)
	Denobulans are a Humanoid species that hail from the planet of Denobula of the Denobula Triaxa system. Denobulans only require 144 hours of sleep per year, although some Denobulans, such asDoctor Phloxof theEnterpriseNX-01, can sleep as little as 48 hours per year. It is customary for adult Denobulans to have three spouses each. Denobulans also have ridges running down their forehead, cheeks, and spine.
Dosi	Dosi II, Gamma Quadrent	"Rules of Acquisition"(DS9)
	A Humanoid species from Dosi II known for their commerce practices and aggression. The main producer of tulaberry wine.
Douwd	Unknown	"The Survivors"(TNG)
	Immortal energy beings with vast powers. Only one is known to exist, choosing to live alone in human form on the planet Delta Rana IV. That one committedxenocideagainst the Husnock. According to Time Magazine, Captain Picard found the Douwd he met an alien "being of extraordinary power and conscience" and felt they should be left alone.

E

Race	Home planet	Episodes (M = mention only)
	Description
Edosian	Edos
	Edosians (aka Edoans) are a race of sentient tripedal beings. Edosians have an orange complexion, two yellow eyes, three arms, and three dog-like legs. Navigator LieutenantArexwas introduced inStar Trek: The Animated Series,but his planet of origin, Edos, was mentioned only in the background material.Passing references to Edosianfloraandfaunahave been made in episodes ofStar Trek: Deep Space NineandStar Trek: Enterprise.In some tie-in novels and short stories, Arex is mentioned as a Triexian, with the Edosians being a near-identical race.
El-Aurian	El-Auria, Delta Quadrant	"Rivals"(DS9)
	El-Aurians(referred to as aRace of ListenersbyDr. Tolian Soran,the El-Aurian antagonist inStar Trek Generations) are ahumanoidrace first introduced in the second season ofStar Trek: The Next Generationwith the characterGuinan.The species was named in theStar Trek: Deep Space Nineepisode "Rivals." El-Aurians appear outwardly identical to humans and have a variety of ethnic types, with both dark- and light-skinned members of the race being shown in variousStar Trekmovies and television episodes. They can live well over 700 years. They are considered a race of listeners and often appear patient and wise. El-Auria, the El-Aurian homeworld, was located in theDelta Quadrantand was destroyed by theBorgin the mid-23rd century. Few survived, and those who did were scattered throughout the galaxy. Some of the refugees came to theUnited Federation of Planets.

F

Race	Home planet	Episodes (M = mention only)
Image	Description
Ferengi	Ferenginar, Alpha Quadrant	"The Last Outpost"(TNG) and several later episodes Many (DS9) episodes "False Profits"(VOY) "Mugato, Gumato"(LOW) "Parth Ferengi's Heart Place" (LOW)
	Main article:Ferengi At the start ofStar Trek: The Next Generation,the Ferengi are considered a mysterious race who care only about profit. They feature as major characters inDeep Space Nine. One of the noted Ferengi isQuark.The race is known for itsRules of Acquisition,sacred precepts that they try to live by.

G

Race	Home planet	Episodes (M = mention only)
	Description
Gorn	Unknown, Beta Quadrant	"Arena"(TOS) "The Time Trap"(TAS) "In a Mirror, DarklyPart 2 "(ENT) "Memento Mori" (SNW) "Hegemony" (SNW)
	Main article:Gorn The Gorn are a violent species who are known for kidnapping large groups of people to serve as incubators for their eggs which they implant inside the body, typically killing the individual when the eggs hatch. Kirk fights with this lizard-like alien in the 1967 "Arena"episode of the originalStar Trekseries. Several Gorn ships attack theEnterprisewhile under Captain Pike's command (SNW). In 2017,Den of Geekranked Gorn the 23rd best alien species of theStar Trekfranchise.

H

Race	Home planet	Episodes (M = mention only)
	Description
Hirogen	Unknown, Delta Quadrant	"Message in a Bottle"(VOY) "Hunters"(VOY) "Prey"(VOY) "The Killing Game"Parts 1 & 2 (VOY) "Tsunkatse"(VOY) "Flesh and Blood"Parts 1 & 2 (VOY)
	The Hirogen are a violent Delta quadrant species encountered by theUSSVoyager.The Hirogen culture is based around hunting other sentient species, whom they regard as "prey." They are humanoid but larger than humans. Reception In 2017,ScreenRantranked the Hirogen the 10th most bizarre aliens in theStar Trekfranchise up to that time.
Horta	Janus VI, Alpha Quadrant	"The Devil in the Dark"(TOS)
	These are silicon-based life forms that eat rock on the planet Janus VI. The appearance of the only Horta shown in the original seriesStar Trekepisode "The Devil in the Dark,"was that of a lump with gray and red all over with no discernable features, looking very much like a giant rock. Every 50,000 years, the entire species die off, except for one mother, who lays thousands of eggs and protects them from danger.In that episode, the creature clashes with a mining colony due to a misunderstanding.

I

Race	Home planet	Episodes (M = mention only)
	Description
Illyrian	Illyria	"Damage"(ENT) "Ghosts of Illyria" (SNW) "Ad Astra per Aspera" (SNW)
	The Illyrians are a species first encountered by theEnterprise NX-01.They are a race that holdsgenetic augmentationas a tradition, with their species adapting themselves genetically to be able to survive almost anywhere.

J

Race	Home planet	Episodes (M = mention only)
	Description
Jem'Hadar	Unknown, Gamma Quadrant	"The Jem'Hadar"(DS9);Star Trek: Deep Space Ninepassim
	The Jem'Hadar feature inStar Trek: Deep Space Nine,first introduced in the episode "The Jem'Hadar".They are theshock troopsof the powerfulDominion,located in theGamma Quadrant.Genetically engineered for strength and resolve, they are also short-lived and believe that "victory is life". They are bred to perceive the Founders – enigmaticshape shifterswho rule the massive Dominion – as gods and are incapable of harming them. The Jem'Hadar are noted as being able to camouflage themselves with their surroundings and depend upon the drug Ketracel White, a substance made and distributed by the Founders as a means of control; their ships have no chairs, replicators, or medical facilities.The Jem'Hadar's numbers are unknown, but they are produced by the thousands as needed. Conceived as "more than just another fearsome alien", theDeep Space Ninemakeup department searched for concepts depicting "toughness and resiliency" in the design of the Jem'Hadar. The final design was based on arhinoceros,with some addedceratopiantraits. Originally designed on the premise that they were all clones, the first Jem'Hadar seen onscreen were all made to look identical to one another. However, as they became more deeply woven into the storylines, each Jem'Hadar was given a distinctive look. In 2017,ScreenRantranked the Jem'Hadar as the 7th most bizarre aliens inStar Trek. In 2017,Den of Geekranked the Jem'Hadar the 11th best aliens of theStar Trekfranchise.

K

Race	Home planet	Episodes (M = mention only)
	Description
Kazon	Nomadic	"Caretaker""State of Flux""Initiations""Maneuvers"(VOY)
	Main article:Kazon The Kazon aliens were introduced onStar Trek: Voyager.
Kelpien	Kaminar
	The Kelpiens lived on the terrestrial planetKaminar,the earth from which Commander Saru hailed inStar Trek: Discovery.The Ba'ul suppressed the Kelpiens for many generations. This race used its technological superiority to feast upon the Kelpien people and prevent them from experiencing Va'Harai and gaining greater consciousness. In S2E7 ofDiscovery,"Light and Shadows," the Kelpiens, with the help of an energy source associated with the Red Angel, all experienced Va'Harai. They lost their innate fear of the Ba'ul. After that, they plan to live in peace with their former tormentors.
Klingon	Kronos,Beta Quadrant	Introduced in "Errand of Mercy"(TOS)
	Main article:Klingon The Klingons are a warrior race with a strict honor code. Their popularity is strong for a fictional race, and they had real language written for them that is spoken in the real world, unique among science fiction aliens. Although the Klingons look very human-like in the original series, they underwent a design change for The Next Generation, explained in the show as a massive genetic alteration that added the iconic ridged foreheads.
Kzinti	Kzin	"The Slaver Weapon"(TAS)
	Main article:Kzinti The Kzinti are feline warriors that appear in the TAS episodeThe Slaver Weapon,who originated inLarry Niven'sKnown Spaceuniverse. The Kzinti had four wars with humanity. According to Sulu, the last one was 200 years before their appearance in the episode. In the STP episodeNepenthe,Riker says that Kzinti are present on the titular planet.

L

Race	Home planet	Episodes (M = mention only)
	Description
Lanthanite	Unknown	Introduced in "The Broken Circle"(SNW)
	The Lanthanites were introduced in the person of Chief Engineer Pelia in the first episode of the second season ofStar Trek: Strange New Worlds.Long-lived, they are noted for having surreptitiously been present, unnoticed, on Earth until the 22nd-century. They serve at Star Fleet Academy and in the fleet.

O

Race	Home planet	Episodes (M = mention only)
	Description
Organian	Organia, Alpha Quadrant	"Errand of Mercy"(TOS) "Observer Effect"(ENT)
	TheOrganiansareincorporealenergy creatures ( "pure energy, pure thought" ). After the climax of the episode "Errand of Mercy,"Spock comments that they are" as far above us on the evolutionary scale as we are above the amoeba. "They assumed humanoid form to" interact "with the Federation representatives and the Klingons. They render all weapons belonging to the opposing parties inoperable through extreme heat and then vanish. The Organians were a race of beings who had evolved into pure conceptual beings, the essence of thought with no human bodies. In some ways, they were similar toQfor power levels and abilities. In the novelQ Strike,the Organians appear to observe a battle between members of the Q Continuum and other seemingly omnipotent beings from theStar Trekuniverse. The original Q identifies them after being asked by CaptainJean-Luc Picardwho they are and is rather dismissive, remarking that "compared to their code of noninvolvement, your Prime Directive is practically an incitement to riot." The Organians also appeared onStar Trek: Enterprisein the episode "Observer Effect,"where they observed members of the crew infected with a silicon-based virus to decide whether or not they should makefirst contactwith humans. They did not technically appear onscreen; they only manifested themselves by possessing the bodies of several members of theEnterprisecrew. In 2017,Den of Geekranked Organians the 20th best aliens of theStar Trekfranchise.In 2020,ScreenRantranked them the 5th smartest aliens of theStar Trekfranchise.
Orion	Orion, Beta Quadrant	"The Cage"(TC) (TAS) (DS9) (VOY) (DIS) (ENT) (LOW)
	Main article:Orion (Star Trek) Orionsare a green-skinned, humanoid alien species in theStar Trekuniverse. An Orion was first portrayed as an illusion in the originalStar Trekpilot. She was seen as well in the broadcast series when this original pilot was incorporated into a two-part episode (episodes 11 and 12) in the first season. Orions are also portrayed inStar Trek: The Animated Series,Star Trek: Deep Space Nine,Star Trek: Voyager,Star Trek: Discovery,Star Trek: Enterprise,andStar Trek: Lower Decks.Rachel Nicholsplayed OrionStarfleetcadet Gaila in the 2009Star Trekfilm.

P

Race	Home planet	Episodes (M = mention only)
	Description
Pakled	Pakled Planet	"Samaritan Snare"(TNG) "Brothers"(TNG)M "No Small Parts," "The Spy Humongous," "we Duj" (LOW) "First First Contact" (LOW)M.
	ThePakledare a species of spacefaring humanoids who obtain technology from other races (rather than developing it themselves), often through trickery. They first appeared in theTNGepisode "Samaritan Snare,"where the Pakled shipMondorfeigned needing repairs. After Chief EngineerGeordi La Forgewas transported to theMondorand completed repairs, the Pakled captured him and demanded weapons technologies. The Pakled do not appear again but are mentioned in theTNGepisode "Brothers"as the Pakleds inadvertently having rescued Data's brotherLore,who was beamed into space at the end of "Datalore."They appeared again inStar Trek: Lower DecksSeason 1 episode "No Small Parts" as the antagonists. The Pakleds, having upgraded their ships using scavenged technology from dozens of species, destroy the U.S.S.Solvang,and cause severe damage to the U.S.S.Cerritos,before being chased away by theCerritosand U.S.S.Titancommanded by Captain William T. Riker.

Q

Race	Home planet	Episodes (M = mention only)
	Description
Q	Unknown	"Encounter at Farpoint","Q Who","Deja Q","Hide and Q","Devil's Due","Qpid","True Q","Tapestry","All Good Things..."(TNG) "Q-Less"(DS9) "Death Wish","The Q and the Grey","Q2"(VOY) "Cupid's Errant Arrow" (LOW)M "Veritas" (LOW)
	Main article:Q (Star Trek) The Q is immortal, seemingly omnipotent creatures, all named Q. Q is their collective name and the name of their Continuum. One Q is particularly interested in humanity and enjoys repeatedly causing trouble for Captains Picard and Janeway and once for Sisko. The proper Q form is never seen as they claim other races cannot comprehend it. The Q was introduced onStar Trek: The Next Generation.

R

Race	Home planet	Episodes (M = mention only)
	Description
Romulan	Romulus, Beta Quadrant (historically, Vulcan in the Alpha Quadrant)	"Balance of Terror","The Enterprise Incident(TOS) "The Deadly Years"(TOS)M Star Trek: Nemesis (PIC)
	Main article:Romulan Romulans are humanoid extraterrestrials that appear in theStar Trektelevision series, where members of their race often serve as antagonists. They are a violent, treacherous offshoot of the Vulcans and rule the militaristic Romulan Empire. They prominently feature in the filmStar Trek: Nemesis.
Reman	Remus, Beta Quadrant	Star Trek: Nemesis "United","The Aenar"(ENT)
	Remans are a humanoid caste related to the Romulans, forced to live as enslaved under the Romulans and work in the hazardous dilithium mines on Remus. They also prominently feature inStar Trek: Nemesis.

S

Race	Home planet	Episodes (M = mention only)
	Description
Son'a	Unknown,The Briar Patch	Star Trek: Insurrection
	Main article:Star Trek: Insurrection Once members of theneo-ludditerace theBa'ku,the Son'a wereexiledfrom their home planet by their fellows for trying to overthrow the leadership and embracing more advanced technology. Now separated from therejuvenating propertiesof the Ba'ku planet, they attempt to avoid death through medical procedures. The Son'a use of technology, including weaponry, was banned within the Federation. Nonetheless, in 2375 the Federation allied with the Son'a to take advantage of their technology to gather rejuvenating 'metaphasic particles' emanating from theringsof the Ba'ku planet, which is in Federation space. After the operation, which involved theforced relocationorgenocideof the Ba'ku, was called into question and stopped by the crew of the Enterprise, a number of the Son'a reintegrated into the Ba'ku population. Others later joined theDominion.The Son'a have subjugated two peoples as their slaves: the Ellora and the Tarlac.
Species 8472	Unknown, Fluidic Space	"Scorpion Part 1 & 2","Prey","In the Flesh"(VOY)"Unimatrix Zero Part 2","Someone to Watch Over Me","The Omega Directive","Q2"(VOY)M
	Main article:Species 8472 Species 8472appeared in four episodes ofStar Trek: Voyager.While passing throughBorgspace,Voyagerencounters Species 8472, a race that surpasses the Borg in combat prowess.

T

Race	Home planet	Episodes (M = mention only)
	Description
Talaxian	Talax, Delta Quadrant	"Dragon's Teeth","Jetrel","Fair Trade","Homestead","The Raven","Investigations","Basics Part II","Caretaker","Random Thoughts"(VOY)
	OnStar Trek: Voyager,the ship's cookNeelixis a Talaxian, first appearing in "Caretaker". In 2017,Den of Geekranked Talaxians the 21st best aliens of theStar Trekfranchise.
Talosian	Talos IV, Alpha Quadrant	"The Cage","The Menagerie"(TOS)," If Memory Serves "(DIS)
	The Talosians were the first race encountered in theStar Trekfranchise. They are a race that used to be technologically advanced and warp-capable, but a nuclear holocaust devastated their homeworld. The Talosians are noted for their power of illusions. In 2017,Den of Geekranked Talosians the 16th best aliens of theStar Trekfranchise.
Tellarite	Tellar Prime, Alpha Quadrant	"Journey to Babel","Whom Gods Destroy"(TOS),"The Time Trap"(TAS),"Carbon Creek","Babel One","Dead Stop","Civilization","Bounty","Borderland","United","Terra Prime"(ENT)," Dream Catcher ", (PRO)" The Red Angel "," Through the Valley of Shadows "(DIS)
	The Tellarites have a facial appearance created by having the actors wearing converted pig masks. Culturally, they are known for their love of arguing and blunt, forceful speech, which most other cultures would consider rude; if Tellarite speech is answered in kind, they will typically consider it an honor. Tellarites appeared rarely in the TNG-era shows, but onEnterprisethey are a significant part of several episodes, becoming one of the founding species of theUnited Federation of Planets.They also appear inDiscovery,in which Gorch, a TellariteStarfleetadmiral, is depicted.The animated seriesLower Decksdepicted a Tellarite captain in the episode "Moist Vessel."In the animated seriesProdigyone of the main characters, Jankom Pog, is a 16-year-old Tellarite. In 2017,Den of Geekranked Tellarites the 25th best aliens of theStar Trekfranchise.
Tholian	Unknown, Alpha Quadrant	"The Tholian Web"(TOS),In a Mirror, Darkly,""Future Tense"(ENT)
	The Tholians are an extremely xenophobic, non-humanoid hermaphroditic species with a propensity for precision. They first appear in the original series episode, "The Tholian Web",where Spock remarks when fired upon by the Tholians:" The renowned Tholian punctuality. "Tholian biology required high temperatures around 480 Kelvin (207 °C, 404 °F). They could tolerate lower temperatures for a brief period; if they were exposed to temperatures around 380 Kelvin or less, their carapace would crack. This was painful or distressing; a Tholian subjected to such a temperature regime could be coerced to cooperate. In temperatures even lower, a Tholian would freeze solid and shatter.
Tribble	Iota Geminorum IV, Beta Quadrant	"The Trouble with Tribbles"(TOS),"More Tribbles, More Troubles"(TAS),"Trials and Tribble-ations"(DS9),"The Breach"(ENT)," Context is for Kings "," Despite Yourself "(DIS)," The Bounty "(PIC)," No Small Parts (LOW)
	Main article:Tribble Tribbles are a small, harmless species noted primarily for their ability to reproduce extremely quickly; this rapid reproduction creates massive Tribble colonies which can be dangerous to any ecosystem.
Trill	Trill, Alpha Quadrant
	The Trill are a humanoid species. A small minority, after a rigorous selection process, are permitted to join with a sentient, intelligent symbiont. The symbiont is long-lived and can pass from host to host, carrying all the prior host's memories, skills, and experiences. Trill symbionts are also capable of joining with human hosts. The Trill made their debut on television in theStar Trek: The Next Generationepisode "The Host"(May 11, 1991), and were further developed inStar Trek: Deep Space Nine.The TrillJadzia Daxis the 8th host of the symbiontDax,and together they are one of the main characters ofDeep Space Ninefor the first six seasons; when Jadzia is killed,Ezri Dax,becomes the next Dax host for the seventh and final season. This species was also briefly represented as a holonovel character corresponding to Ensign Harry Kim onStar Trek: Voyagerin "Author, Author"(April 18, 2001). Adira Tal, a human joined with a Trill symbiont, appears in the third season ofStar Trek: Discovery.A Trill doctor, Naáshala Kunamadéstifee, appears inStar Trek: Picard,and several Trill also feature inLower Decks. Trill have been studied in analyzing the biology ofStar Trek,especially regarding the symbionts. There are two contrasting concepts for Trill. One is that a symbiont is essentially an alien person;nonetheless, the joined Trill still mixes the original person with the memories and some of the personality of the symbiont.Only a tiny percentage of Trill are joined, and being accepted for the process is considered an honor.For joined Trill, a symbiont's memories, and to some extent personality, are synthesized with the existing Trill's character.Joined Trill have been studied in the philosophies ofStar Trek,in particular, whether a person is essentially the sum of their memories (the philosopher Locke's "memory theory" ).This concept was explored in theStar Trek: Deep Space Ninetelevision episode "Dax."(seePersonal identity § Locke's conception) The contrasting philosophy of the symbiont is called "functionalism," according toStar Trek and Philosophy: The Wrath of Kant,in which people are defined by their actions as opposed to memories.The symbionts have been dismissed as "just memories"rather than an actual person, although in other cases they are described as a "sentient symbiotic organism."

V

Race	Home planet	Episodes (M = mention only)
	Description
Vidiian	Vidiia Prime, Delta Quadrant	"Phage","Faces","Lifesigns","Deadlock","Resolutions","Coda","Think Tank","Fury"(VOY)
	Main article:Vidiians The Vidiians are encountered in the Delta Quadrant byVoyager.
Vorta	Kurill Prime, Gamma Quadrant	Seasons 2-7(DS9)
	Vorta are a member race of theDominion.One family of then-primitive Vorta once saved one of the Changelings, the rulers of the Dominion. For this, they were genetically engineered into an intelligent species thoroughly loyal to the Changelings and, since then, acted as Dominion administrators, field commanders, scientists, and diplomats. They have direct authority over the Jem'Hadar and are tasked with dispensing doses of Ketracel White to them. In 2017,Den of Geekranked the Vorta the 15th best aliens of theStar Trekfranchise.
Vulcan	Vulcan,Alpha Quadrant	Introduced in "The Cage"(TOS)
	Main article:Vulcan (Star Trek) Vulcans are an advanced, brilliant, warp-capable humanoid species from the planet Vulcan. In the past, they were emotional and highly violent until the philosopherSurakconvinced most of them to strive to suppress their emotions. War broke out between Surak's followers and those who refused to accept his teachings. Eventually, the latter left Vulcan; one of these factions became the Romulans. While modern Vulcans still feel emotions, they consider it shameful to display or be governed by them. They seek to act by logic alone.

X

Race	Home planet	Episodes (M = mention only)
	Description
Xindi	Xindus, Delphic Expanse	"The Expanse"(ENT) Season 3(ENT) Star Trek: BeyondM
	Xindi Star Trekrace In-universe information Home world Xindus Language Various native languages Affiliation Sphere Builders (22nd century),United Federation of Planets(26th century) Leader Governed by theXindi Council TheXindi/ˈzɪndi/is the collective term for sixfictional racesin thescience fictiontelevision seriesStar Trek: Enterprise.The entirethird season,broadcast from 2003 to 2004, centered on this group of previously unknown aliens. They are native to theplanetXindus in a region ofspaceknown as theDelphic Expanse.They consist of five species resembling familiar Earth animals (a rarity for alien races inStar Trek) and a sixth resembling humans. At first, they appeared as violent enemies wanting no interaction with humanity. Still, the common ground gradually emerged as the crew of theEnterprisediscovered that the Xindi were being manipulated into this hostility by the Sphere Builders. Some Xindi became important recurring characters as the 24-episode story arc unfolded. During the thirteenth live-action film in the series,Star Trek Beyond,the Xindi were mentioned along with theRomulansas aliens that humanity fought wars against in the years leading up to the formation of the Federation. Their defeat and the eventual alliance were the cause behind Edison's mutiny against the Federation, leading him to become the villain Krall. First appearance The Xindi's presence was established in the second-season finale ofStar Trek: Enterprise,"The Expanse",in which the Xindi launched a probe that attackedEarthin April 2153, killing seven million people in a strip of destruction stretching fromFloridatoVenezuela.They appeared again in the third-season premiere, "The Xindi,"to play a significant role in the primary story arc of season three. Xindi history See also:Star Trek: Enterprise season 3 The Xindi are a collective of six intelligent species that evolved simultaneously on the same planet (Xindus). Despite the radically different appearance of all six species, they all share identical ridges on their cheekbones and have very similar DNA. All six of these species were involved in a war lasting about 100 years and ending in the 2030s. Alliances among the Xindi species were forged and changed continuously throughout the war, so much that most Xindi forgot what started it 50–60 years into the fight. Everyone remembered how it ended, however. In desperation, the Insectoids and Reptilians detonated several charges beneath the eight most enormous seismic fissures of the geologically unstable planet Xindus, leading to its destruction and, ultimately, the extinction of the Avian race. After the war, the Xindi scattered throughout the Expanse into severalcolonies.They are passionate about establishing a new homeworld and unifying all Xindi. Still, they differ significantly on how to accomplish this and who should hold the ultimate reins of power. The Xindi then spent the early part of 2153 deciding how to confront the threat of humanity and planned abiological weaponbased on the human genetic profile. This was ultimately rejected by the Xindi Council (the Reptilians went ahead with the bio-weapon but were eventually foiled), so they worked on a weapon to destroy Earth. (Although they technically succeeded, the timeline in which this occurred was undone.) InStar Trek Beyond,Krall, formerly Captain Balthazar Edison, is mentioned to have fought the Xindi and is enraged by the idea of making peace with them and other enemies such as the Romulans. Sphere Builders The Xindi were pawns in theTemporal Cold War,as interference in their history began shortly after the ending of their civil war, with the appearance of a trans-dimensional alien race who guided them to new homelands and resources. The Xindi came to revere these "Guardians," whom they later understood to be the same species as the "Sphere Builders." These aliens were also similarly revered by the Trianon, who believed that deities, which they called "The Makers," constructed the spheres to transform the expanse into a paradise. This led to a devastating religious civil war, as seen in the episode "Chosen Realm." The Xindi were also informed by the Guardians, at least as early as 2152, that they would be victims of agenocidalattack from humans in the 26th century. Following their guidance, the Xindi launched a preemptive test strike on Earth as a precursor to a devastating second attack. InDaniels' timeline, Xindi crewmen serve in theFederationin the 26th century, in a battle with humans, and Xindi against the Sphere Builders. With the help of Captain Archer's evidence of future cooperation, the Xindi Council began to split over the issue of whether the Guardians were the real enemy. The split widened when Reptilian Council MemberDolimkilled Primate Council MemberDegra. With the help of the Guardians, the Reptilians and Insectoids then took control of the finished Xindi weapon and set on a course for Earth, thus triggering a newcivil war.A combined fleet of Arboreals, Primates, and Aquatics pursued the weapon. En route to Earth, a rift appeared in the Reptilian-Insectoid alliance when the Insectoids proposed delaying the destruction of Earth in light of Archer's revelation about the true nature of the Sphere Builders. The Reptilians determined to see the task completed and eliminated the accompanying Insectoid vessel. Arriving near Earth, anAndorianship, commanded byShran,suddenly destroyed the Reptilian ship, allowing humans to board the Xindi weapon and destroy it. At the same time,Enterprisewas able to destroy the entire sphere network, stopping the spatial anomalies. With the Sphere Builder threat ended, the Xindi Council reconvened (the Reptilians were eventually convinced to return), and the Xindi abandoned their belief in the Guardians and their hostile intent toward humans. Xindi species Xindi-Aquatics Xindi-Aquatics resemble Earthsirenians,swimming underwater and speaking throughecholocation.Aquatics have a reputation for taking a long time to make a decision but are more readily convinced by visual evidence. The Xindi have a saying, "It's easier to count the stars than it is for an Aquatic to reach a decision." The appearance of the Aquatics in the series was inspired by theMosasaurus. Even though the Aquatics are peaceful, they have a strong military. Their warships resemble large Earthmanta raysand are filled with water. At least one section of the ship is sealed and filled with air for land-based races. This room also has a window so the visitors can communicate with the Aquatic crew. Marine vessels can emit a field that disrupts targeting scanners. This can also be applied to protect other ships. However, their boats are very slow and cannot travel much faster than Warp 2. Sunken ships also carry potent weapons and are more than a match for Insectoid and Reptilian ships. Sunken warships are enormous, and one of them was depicted carrying theEnterprise NX-01to Earth inside a chamber within the vessel after the Xindi weapon was destroyed. Xindi-Arboreals Xindi-Arboreals are covered withhairand resemble Earthsloths.They run kemocyte-production facilities throughout the Delphic Expanse.Gralik,a Xindi-Arboreal, gaveDegraa shipment of impure kemacite to sabotage the production of the Council's weaponprototype.They have shown the least interest in destroying humanity. Arboreals are also afraid of the water. They are well-known as scientists.Jannarwas a friend ofDegraand an ally ofCaptain Archer. Xindi-Avians Xindi-Avians werebirdlikeXindi with the ability to fly, although all that is ever seen of this species is a single skull, identical to that of agiraffe.They once darkened the skies of Xindus, the Xindi homeworld. They are considered extinct since the Reptilians and Insectoids planted explosives that destroyed the Xindi homeworld after the Hundred-Year War. The Avians, having primitive technology, could not leave the planet and were wiped out. Because of this, the Reptilians say that their lair, in which the Xindi Council now convenes, has a "stench of failure." Xindi-Insectoids Xindi-Insectoids resemble a cross between six-foot Earthpraying mantids,flies,andants.Insectoids have anaverage life spanof 10–12 years. They reproduceasexuallyby layingeggs,which take about a week to mature. Egg sacs are suspended from ceilings, and tubules connected to them spray chemicals that cause passersby to reverseimprinton the hatchlings, protecting them as aparentwould. Hatchlings are so crucial to Insectoids that hatcheries aboard starships are heavily shielded. As seen in the episode "Hatchery,"the Insectoid crew will sacrifice themselves to preserve their unborn offspring. They speak a clickinglanguage,of which there are 67 known dialects.Insectoidiconographyis radically different from that of other Xindi. Insectoid personal names get longer with age. Insectoids have a reputation for rushing into decisions. Insectoid starships are designed differently from other vessels. They don't have one area designated for bridge duties; command functions are distributed throughout the ship. Insectoid chairs and assault vehicles are designed for Insectoid anatomy and not humanoids. They have a longstanding alliance with the Reptilians, and together they destroyed the Xindi homeworld after the Hundred-Year War. Xindi-Primates Xindi-Primates resemble Earthhumansand have a similar brain structure to the Xindi-Reptilians. They were one of the first Xindi species (including the Reptilians) to be informed of the "threat" posed by humanity. Degra, a Xindi-Primate, was assigned to develop the weapon to destroy Earth. In late 2153, the crew of theEnterpriseboarded and studied a Primate's vessel and interrogated the crew. In the episode "Stratagem,"Archer learned from Degra that a colony of Primates resides onAzati Prime,where the weapon was being constructed. Like humans, Xindi-Primates have differences in skin tone. The chairman of the Xindi council was a Xindi-Primate. Xindi-Reptilians Xindi-Reptilians resemble a cross between several Earthlizards.This species is responsible for a preemptive attack on Earth in 2153. Aided by trans-dimensional beings, the Reptilians also traveled to 2004 to collectbloodsamples for their bioweapon in the future but were foiled byJonathan ArcherandT'Pol.Reptilians prefer to be low to the ground instead of in highrise buildings. They use weapons with regenerative biometric power cells that overload if another species tries to use them. They use thermal chambers on board their ships to keep their energy. They are the most aggressive race of Xindi and seem more interested than the other races in destroying Earth. The military leadership of the Reptilians appears to be obsessed witheugenics.The Xindi-Insectoids is the race that the Reptilians are closest to. Along with the Insectoids, they are responsible for destroying the Xindi homeworld. The attack squadrons seen atAzati Primeconsisted of two Reptilian and Insectoid ships. CommanderDolimwas the Xindi-Reptilian representative on the Council. Xindi Council The Xindi Council is the jointgovernmentalbody of the Xindi races, as seen in Season three ofStar Trek: Enterprise.The Council was formed after the destruction of the Xindi homeworld Xindus in the 2030s. It consisted of two representatives of each Xindi species and was created to find a new homeworld for all the Xindi races. Although they found a few suitable planets, they could never agree on a final choice. The Council chamber is located on a world 15.6light-yearsfrom Azati Prime. The land-based races sit at a large round table in the center of the room, while the Aquatics look on from a large tank adjoining the chamber by a window. The section has built-in equipment for holographic and a viewscreen for telemetry. The room was a stronghold built by the Xindi-Avians before they were wiped out. Circa 2152, the council discovered that humans would destroy them in four hundred years. In a panic, they assigned the Primate scientist, Degra, to construct a weapon to destroy Earth. After several disagreements, the Council was dissolved. To do the Sphere Builders' bidding, the Reptilians and Insectoids broke away from the Primates, Arboreals, and Aquatics.Civil warultimately broke out when Commander Dolim killed Degra. After Dolim was killed, the Sphere Builders were discredited, the super-weapon destroyed, and the Council reconvened. The names of council representatives as revealed in "The Council"were: Arboreals:Jannar Aquatics: Kiaphet Amman'sor Insectoids: unknown (most Xindi Insectoid names are unpronounceable by humans; called "Shrest" in the novelizations) Primates: The Chairman,Degra Reptilians:regimentalcommanderDolim Other significant Xindi characters Kessick– Primate, enslaved on aTrellium-Dmine Thalen– Primate, Degra's assistant Gralik– Arboreal, chief technician of kemocite facility Reception In 2017,ScreenRantranked the Xindi the 13th most bizarre aliens inStar Trek. In 2017,Den of Geekranked Xindi the 14th best aliens of theStar Trekfranchise.

See also

• List of fictional extraterrestrials

Further reading

• Michael Okuda and Denise Okuda (1999).The Star Trek Encyclopedia: A Reference Guide to the Future.New York: Pocket Books.ISBN0-671-53609-5.

External links

• Races and culturesatMemory Alpha