A boar-like animal living in the dark jungles of the rogue planet Dakala, hunted and eaten by the Eska in the episode Rogue Planet.
The drayjin is a tusked, boar-like animal native to Dakala, a planet without a star whose jungles are warmed by volcanic vents. It is one of the creatures that make the world a hunting ground for the Eska.
In the episode Rogue Planet, the landing party from Enterprise NX-01 comes across an Eska camp. The hunters, who visit Dakala for a few days at a time, have brought down a drayjin and share the roasted meat with their guests.
The animal is ordinary game. The hunters' real ambition is the telepathic, shape-changing prey they call wraiths, and it is that hunt which draws Captain Archer into opposing them.