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 ...

While some might describe a hagfish as 'repulsive,' 'disgusting' or, more poetically, 'Lovecraftian', we would have to strongly disagree. Hagfishes are excellent: they are part of the ocean's clean-up ...