Macrouroidinae

Macrouroidinae is a subfamily of rattails from the family Macrouridae,^[2] it contains only two species in two genera found in most tropical and temperate ocean. These species lives in deep-water. These fishes have a huge and rounded head with the consistency of a water-filled balloon. The eyes are tiny. The chin barbel is absent.^[1]

Macrouroidinae
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Gadiformes
Family:	Macrouridae
Subfamily:	Macrouroidinae H. M. Smith & Radcliffe, 1912
Genera[1]
Macrouroides Smith & Radcliffe, 1912 Squalogadus Gilbert & Hubbs, 1916

References

1. Iwamoto, T., Nakayama, N., Shao, K.-T. & Ho, H.-C. (2015): Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan. Proceedings of the California Academy of Sciences, (Series 4), 62 (3): 31-126.
2. Nicolas Bailly, ed. (2015). "Macrouroidinae Smith & Radcliffe, 1912". WoRMS. World Register of Marine Species. Retrieved 31 March 2018.