The Hagfish Is the Slimy Sea Creature of Your Nightmares

The hagfish is a slime-emitting ocean-dweller that's remained unchanged for 300 million years--and it shows. It has a skull (but no spine), velvet smooth skin, and a terrifying pit of a mouth that's lined with rows of razor-sharp teeth. (03:00)

3play_processed Science Smithsonian Channel Wildlife