|Velvet belly lanternshark, Etmopterus spinax|
Etmopteridae is a family of sharks in the order Squaliformes, commonly known as lantern sharks. Their name comes from the presence of light-producing photophores on their bodies. The members of this family are small, under 90 cm (35 in) long, and are found in deep waters worldwide. There are 45 species in five genera. Three-quarters of the species are in the genus Etmopterus.