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Blacktail butterflyfish
The Black-tailed Butterflyfish (or blacktail butterflyfish), also called Exquisite Butterflyfish, is known as ''Chaetodon austriacus'' by its scientific name. This species of butterflyfish (family Chaetodontidae) is found in the Red Sea and around southern Oman only.〔Lieske & Myers (2004), FishBase (2008)〕 Supposedly, a Black-tailed Butterflyfish was sighted in El Nido, Palawan (Philippines) by Dr. Gerry Allen during a fish identification project in July 2007.〔()〕
The Black-tailed Butterflyfish is up to 14 cm long and is orange with thin, curved black stripes. Its anal fin and tail are black. The body of juveniles is whiter above with white bands on the tail. The Melon butterflyfish (''C. trifasciatus'') and the Oval butterflyfish (''C. lunulatus'') are similar in coloration but have less black on the caudal and anal fins.〔Lieske & Myers (2004)〕
Together with the Melon and Oval butterflyfishes and probably also the somewhat aberrant Arabian butterflyfish (''C. melapterus'') it makes up the subgenus ''Corallochaetodon''. They are probably quite close to the subgenus called ''Citharoedus'' (that name is a junior homonym of a mollusc genus), which contains for example the Scrawled butterflyfish (''C. meyeri''). Like that group, they might be separated in ''Megaprotodon'' if the genus ''Chaetodon'' is split up.〔Fessler & Westneat (2007), Hsu ''et al.'' (2007)〕
Black-tailed butterflyfishes tend to be found in coral-rich areas between 0.5 and 20 m deep, on seaward reefs or in lagoons or bays. Adults are generally found in pairs patrolling a territory or range while juveniles are found among coral branches. This species grazes on coral polyps and sea anemone tentacles.〔
==Footnotes==
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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