With a name like "Big-Finned Jellyhead," you wouldn't automatically associate the Cirroteuthis muelleri with elegance. But when floating in the depths of the Arctic Ocean, Cirroteuthis transforms its appearance, donning what looks like a beautiful ball gown.

First described scientifically in 1836, the big-finned jellyhead's dress - ahem - body, body is off-white or pale purple, with the inner side of its arms and webs being brownish-purple. Prom-ready but camera-shy, this cephalopod tends to hang around the seafloor, making it difficult to observe without a submersible.

Then again, maybe the big finned jellyhead isn't dancing for you. At depths of 3,300m, it sways its fragile fins and swings its tendrils to a tune we can't hear, in the dark ocean where no light can reach.