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sweeper
Sweepers are small, tropical marine (occasionally brackish) perciform fish of the family Pempheridae. Found in the western Atlantic Ocean and Indo-Pacific region, the family contains about 26 species in two genera. One species (''Pempheris xanthoptera'') is the target of subsistence fisheries in Japan, where the fish is much enjoyed for its taste. Sweepers are occasionally kept in marine aquaria.
== Description ==
Deeply keeled, compressed bodies and large eyes typify sweepers, their form somewhat like hatchetfish; both cycloid and ctenoid scales may be present. The small, short dorsal fin begins before the body's midpoint and may have four to seven spines; the anal fin is extensive and usually has three spines. The mouth is subterminal and strongly oblique. Species of the genus ''Parapriacanthus'' have much more cylindrical bodies.
Some species possess photophores. All but the curved sweeper (''Pempheris poeyi'') possess a gas bladder. The largest species is the common bullseye (''Pempheris multiradiata'') at long; most other species measure or less. Colouration is relatively subdued.
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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