Shad

Alosinae
Twaite shad, Alosa fallax
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Clupeiformes
Family:	Clupeidae
Subfamily:	Alosinae
Genera
Alosa Linck, 1790 Brevoortia Gill, 1861 Ethmalosa Regan, 1917 Ethmidium Thompson, 1916 Gudusia Fowler, 1911 Hilsa Regan, 1917 Tenualosa Fowler, 1934

The Alosinae, or the shads, are a subfamily of fishes in the herring family Clupeidae. The subfamily comprises seven genera worldwide, and about 30 species.

The shads are pelagic (open water) schooling fish, of which many are anadromous or even landlocked. Several species are of commercial importance, e.g. in the genus Alosa (river herrings), Brevoortia (menhadens), and Hilsa.

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Wikipedia