Its common name comes from its habit of filling up with water and the unique location of its Syphon, with a wild-looking tuft of eight arms and two tentacles. Its body is almost totally clear so that it reveals the dark-coloured internal organs. The piglet squid is a sluggish swimmer with ammonium ions in its body fluid that helps keep it Bouyant. A large light-producing organ (photophore) is located beneath each of its large eyes.
The Cabrillo Marine Aquarium collected this specimen.