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The threadfin jack or thread pompano, ''Carangoides otrynter'', is a species of coastal marine fish in the jack family Carangidae. The species inhabits the tropical waters of the eastern Pacific Ocean from Baja California in the north to Ecuador and the Galapagos Islands in the south. It is a moderately large fish, growing to and may be recognized by its filamentous dorsal and anal fin lobes. The threadfin jack inhabits both deeper coastal waters and inshore environments, including reefs and estuaries, where it preys on minute benthic and pelagic organisms, including small fishes and crustaceans. Very little is known about the ecology and reproductive cycle in the species. The threadfin jack is of importance to fisheries throughout its distribution, caught by hook-and-line and net methods and marketed fresh and salted, and is considered a very good table fish. The species was named ''Carangoides dorsalis'' by Theodore Gill 20 years before the name ''Caranx otrynter'' was introduced, but confusion with ''Vomer dorsalis'' led to the proposal of the new name to separate the two species. ==Taxonomy and naming== The threadfin jack is classified within the genus ''Carangoides'', one of a number of groups of fish referred to as jacks and trevallies. ''Carangoides'' is further classified in the family Carangidae, of the suborder Percoidei and the order Perciformes. The species was first scientifically described by the American ichthyologist Theodore Gill, who named the species ''Carangoides dorsalis'' based on the holotype taken from the west coast of Central America. This name and description was published in the ''Proceedings of the Academy of Natural Sciences'' of Philadelphia, in which Gill one year previously described another carangid, ''Vomer dorsalis''. The state of carangid taxonomy at the time was rather confusing, with many synonymous genera and species present in the literature, and ''Vomer dorsalis'' was soon moved to ''Caranx'', as was ''Carangoides dorsalis'', creating a taxonomic homonym. To address this problem, the American ichthyologists David Starr Jordan and Charles Henry Gilbert in 1883 created the name ''Caranx otrynter'' as a replacement for the species originally named ''Carangoides dorsalis'', basing their description on a new holotype specimen taken from Mazatlán, Mexico. The authors indicated that if ''Vomer'' was found to be a valid genus or subgenus, ''Vomer dorsalis'' could be reinstated and the original combination of ''Caranx dorsalis'' be restored. Despite ''V. dorsalis'' being transferred to ''Selene dorsalis'', this never occurred and in a 1994 publication, Gerald Allen and D. Ross Robertson placed ''Caranx otrynter'' into the genus ''Carangoides'', where it has remained ever since. The specific name ''otrynter'' is derived from Latin, and means a driver, in allusion to the whip-like ray of the second dorsal fin.〔 The common names of the species, threadfin jack and thread pompano, also refer to the filamentous, threadlike dorsal fin. 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「Threadfin jack」の詳細全文を読む スポンサード リンク
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