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Herring scad
The herring scad (''Alepes vari'') (also known as the duskyfin crevalle and trevally scad), is a common species of tropical marine fish in the jack family Carangidae. The species inhabits the surface waters of coastal regions throughout the Indo-West Pacific region, feeding on a variety of crustaceans and small fishes. It is the largest fish of the scad genus ''Alepes'', growing to a recorded length of 56 cm. The herring scad is identified among the genus ''Alepes'' by its more numerous and smaller scutes and the number of gill rakers on the first arch. It is of minor importance to fisheries throughout its range.
==Taxonomy and naming==
The herring scad is one of five extant species in the scad genus ''Alepes'', a group of fish in the jack family, Carangidae. The Carangidae are perciform fish in the suborder Percoidei.
The species was first scientifically described by the French naturalist Georges Cuvier in 1833 from a specimen now lost to science. He named the species ''Caranx vari'', believing the fish was closely affiliated with the large jacks of that genus. The species was later transferred to the scad genus ''Alepes'' by Gushiken in 1983, and a specimen from Puducherry, India was designated to be the lectotype the following year by Smith-Vaniz. The species was redescribed and renamed twice after Cuvier's description, first by Pieter Bleeker as ''Selar macrurus'' and then by Henry Fowler as ''Alepes glabra'', both of which are junior synonyms discarded under ICZN rules. Although commonly called the 'herring scad', the names duskyfin crevalle, trevally scad and, incorrectly, blackfin scad (''A. melanoptera'') are applied to the species.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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