After 1,000 meters, the only light you find is produced by animals. So when you get down to near 7,000 meters, it's a completely different environment. It's pitch black, the pressure, the temperature ...

The dozen or so species that make up Grimpoteuthis are called Dumbo octopuses because of the two large fins—one on either side of the mantle—that protrude like ears. Add in the octopus’s ...