Gymnelus

Gymnelus
Gymnelus hemifasciatus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Perciformes
Family:	Zoarcidae
Genus:	Gymnelus J. C. H. Reinhardt, 1834

Gymnelus is a genus of small fish in the family Zoarcidae found in the Arctic Ocean, and adjacent parts of the North Pacific and North Atlantic. They are highly variable in color, which has resulted in the description of several taxa now considered invalid.

There are currently five recognized species in this genus:

Several other species have been described in this genus but these are synonyms (G. hemifasciatus with synonyms G. diporus, G. knipowitschi and G. soldatovi; G. retrodorsalis with synonyms G. andersoni, G. esipovi and G. taeniatus; and G. viridis with synonyms G. barsukovi, G. bilabrus, G. gracilis, G. obscurus and G. platycephalus).

...
Wikipedia