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 ...

The brown hagfish (Pacific), or more precisely Eptatretus stoutii, is another creature known to science for a long time but stands out among other species due to its astonishing abilities.Look ...