The Dumbo Octopus
This cutey is called the Dumbo Octopus, so named because of its fins which look like the ears of the Walt Disney character. They generally live at depths of 3000 - 4000 meters, but have been sighted at 7000 meters. At about 20cm, they are not that big, but strangely prefer to swallow their prey whole. There are about 37 species in every ocean.
Here is a link to the BBC Website page for the Dumbo Octopus for more info.