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The Indian threadfish (''Alectis indica'') (also known as the Indian threadfin, diamond trevally, mirror fish and plumed trevally) is a large species of coastal marine fish of the jack family, Carangidae. The species is widespread in the waters of the tropical Indo-West Pacific Ocean, ranging from east Africa to India, Asia, Indonesia and Australia. Adult fish tend to inhabit coastal waters over reefs down to 100 m in depth, while juveniles inhabit a variety of environments including estuaries and seagrass beds. The Indian threadfish is similar to the other two species in the genus ''Alectis'', with a slight concavity in the profile of the head the most obvious distinguishing feature. It is a large species, growing to 165 cm and 25 kg in weight. The species is carnivorous, consuming fishes, cephalopods and crustaceans. The Indian threadfin is of minor commercial importance, and has been the subject of aquaculture in Singapore. ==Taxonomy and naming== The Indian threadfish is one of three members of the diamond trevally genus ''Alectis'', which itself is one of 33 genera encapsulated in the jack family, Carangidae. The Carangidae are perciform fishes in the suborder Percoidei. The species was first recognized and scientifically described by the German naturalist Eduard Rüppell in 1830 under the name ''Scyris indicus'', with the type specimen collected from the Red Sea.〔 〕 After Rüppell's designation, a number of other naturalists unknowingly re-described the species, with the names ''Hynnis insanus'', ''Caranx gallus'' and ''Hynnis momsa'' applied to the species by the various authors. Rüppell's original classification was also revised; the fish was first placed in ''Seriolichthys'', and finally in the senior genus ''Alectis'' by James Douglas Ogilby in 1913. The species' name has been given as ''Alectis indicus'' in the literature, however the genus ''Alectis'' is feminine and thus the spelling ''indica'' is the correct one.〔http://research.calacademy.org/redirect?url=http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatget.asp&tbl=species&spid=15347〕 The common name of the species, 'Indian threadfish' or 'Indian threadfin' refers to its distribution which includes Indian waters, and the characteristic elongated dorsal fins in juveniles. Other common names, such as mirror fish and diamond trevally, describe other aspects of the species' appearance.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Indian threadfish」の詳細全文を読む スポンサード リンク
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