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 ...

You can check out more of her work here. View Full Profile. Learn about our Editorial Policies. Hagfish are notorious for their defensive slime, which can swell from a small secretion to a carload of ...