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Kingdom Animalia  
 Phylum Chordata  
 Class Actinopterygii  
 Order Perciformes  
 Family Acanthuridae  
 Genus Naso  
  Naso tonganus  (Valenciennes, 1835) 
Provider: Kwang-Tsao Shao 
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Synonyms:Acanthurus tuberosusCyphomycter tuberosusNaseus tonganusdetails
Citation: 臺灣魚類誌(沈等, 1993);Fishes of the Great Barrier Reef and Coral Sea(Randall et al.,1990)
Character: Dorsal-fin rays V, 26-29 ; anal-fin rays II, 26-28 ; pectoral-fin rays 16-18 ; pelvic-fin rays I,3. Adults with an obtusely rounded protuberance on front of head not extend anterior to mouth even on largest individuals; two candal peduncular plates, the keel on each large with a forward-projecting point; caudal fin deeply emarginate in juveniles to slightly emarginate in adults; head and dorsal part of body gray with scattered small plate blotches and numerous. Body gray, head and dorsal part scattered with small pale blotches and numberous small black spots, with a ventral extension of small black spots beneath outer part of pectoral fin; ventral half of body pale gray to white, a large blackish spot below and in front of pectoral fin base.  
Habitat: A coral-reef species found in coastal to outer reef, usually at moderate depth in reef channels subject to strong currents, or around rocky outcrops along shores. Feed mainly on leafy or fleshy algae, but also on zooplankton when abundant. Occur as solita 
Distribution: Western Indian Ocean: Mauritius, Seychelles, and Mozambique. Probably more wide-ranging. Taiwan: Lanyu, Lyudao.  
Utility: Commercial fishery and aquarium species. 
Name Code: 381289
  IUCN Red List:LC      Marine     
Suggested Link    The Fish Database of Taiwan  FishBase  Discover Life  World Register of Marine Species (WoRMS) 
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