Deep-sea octopuses like this amazing one in the genus Grimpoteuthis (~17 species) are sadly nicknamed “dumbo octopuses” (after the Disney character) and are generally poorly understood because they live so deep at ~3,000-4,000 m (the average ocean depth is 3,790 m). They differ from other octopuses by generally having abandoned jet propulsion, relying on their ears fins as their primary mode of locomotion. Their fins are supported by an internal shell (which also differs from other octopuses, who usually have no shells of any kind) and their arms are also seriously webbed, with their webbing usually reaching to the tips of their arms. Learn more about finned deep-sea octopuses, Grimpoteuthis spp. and watch for more deep-sea life aboard the E/V Nautilus at