The Hagfish This primitive animal has teeth on its tongue, secretes a viscid slime and can tie itself in a knot. It also has four hearts, the nature of which may clarify cardiac function in higher ...

You may have come across eel-like hagfishes from the few times they have gone viral on the internet, but they might be even more unusual than the videos and photos suggest. While some might describe a ...

Stephen and his guests discuss the defence mechanisms of the Hagfish. When captured it secretes copious amounts of slime and ties itself in knots.

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 ...