“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,” says @natgeo. This clip from ROV SuBastian shows a great example of how Dumbo Octopuses use the flapping their strong fins to propel themselves through the water, as opposed to the jet propulsion (expelling water forcefully from their siphons) as other octopuses do. Another noticeable difference is that the Dumbo octopus doesn’t h