Polypera

Polypera is a monospecific genus of marine ray-finned fish belonging to the family Liparidae, the snailfishes. It only species is Polypera simushirae which is found in the northwestern Pacific Ocean where it is found at depths down to 833 m. This species grows to a length of 77 cm TL and has been recorded at a maximum weight of 11 kg. This species is the only known member of its genus. It is probably, the largest of the snailfishes.