Ridge worm
From Transformers Wiki
Ridge worms are enormous predatory lifeforms who inhabit the magical land of Menonia. Part animal, part geography, these sessile creatures subsist on whatever unlucky creatures stumble into their waiting mouths, and whatever's not crushed by their stone teeth and digested are torn apart by legions of parastic creatures that dwell within the worm's internal anatomy.
Fiction
King Grimlock
While trapped in Menonia, Grimlock stumbled into a ridge worm's open maw and was nearly devoured by the monster. He was rescued by his travelling companion Arko, and the pair eventually fought their way out of the creature's anatomy and back out into the jungle. Grimlock the Defender
