Polyipnus tridentifer

Polyipnus tridentifer, commonly known as the three-spined hatchetfish, is a species of ray-finned fish in the family Sternoptychidae. It occurs in deep water in the Indo-Pacific Ocean, at depths between about 640 and 825 metres (2,100 and 2,700 ft).^[2]

Polyipnus tridentifer
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Stomiiformes
Family:	Sternoptychidae
Genus:	Polyipnus
Species:	P. tridentifer
Binomial name
Polyipnus tridentifer McCulloch, 1914 [1]