The dumbo octopus is thought to be the deepest-living octopus, diving up to 13,000 feet below the surface. It's typically under a foot long, though they can measure up to 6 feet.

This video footage captured Sept. 13 by an ROV shows a dumbo octopus swimming with its ear-like fins in Hawaii's deep sea. (Image credit: Ocean Exploration Trust/NOAA/Nautilus Live) ...

Rare footage shows a 'Dumbo' octopus more than 5,500 feet underwater, swimming with its ear-shaped fins By Marianne Guenot ...