Dumbo Octopus!
Behold, a dumbo octopus! Also called grimpoteuthis. And Pikachu of the Deep. I also like the name Grimpo.
Also known as the "Dumbo octopus", the Grimpoteuthis is a benthic mollusc found on the ocean floor at depths of 300-400 meters. Dumbo octopuses, which can grow to up to 20 centimeters, are soft-bodied or semi- gelatinous octopuses with a pair of fins located on their mantle and webbing between their arms. Grimpoteuthis swim by moving their fins, pulsing their webbed arms, pushing water through their funnel for jet propulsion, or all three at once. They can swim up off the bottom and hover a bit just above the seafloor looking for snails, worms, and other food.
Heard about on boingboing; photo and quote from here