The Hagfish

Hagfish have elongated, eel-like bodies (so flexible they sometimes tie themselves in knots). They have four hearts, two brains, and a paddle-like tail.

The Vampire Squid

The Vampire Squid, or Vampyroteuthis infernalis (which literally translates as “vampire squid from hell”), is another inhabitant of the deep sea, usually found in temperate and tropical oceans and was actually incorrectly identified as an octopus when it was first spotted.

The Lumpfish

Living up to its name, the lumpfish has scaleless skin with a bumpy ridge down its back (which is actually a modification of the first dorsal fin) and rows of knobby protuberances, called tubercles, down each side.