HomeFish encyclopediaRay-finned fishesPerch-like fishSurgeonfishes, tangs, unicornfishesWhitefin surgeonfish Whitefin surgeonfish (Acanthurus albipectoralis) Scientific name: Acanthurus albipectoralis Allen & Ayling, 1987 The Whitefin surgeonfish (Acanthurus albipectoralis) is a marine fish of the family Acanthuridae. Native range: Western Pacific, Great Barrier Reef and Coral Sea to Tonga. BiologyDorsal spines (total): 8 - 9; Dorsal soft rays (total): 22-33; Anal spines: 2 - 3; Anal soft rays: 18 - 31; Vertebrae: 22. Body varying from light bluish grey to dark brown, without blue lines. Outer part of pectoral fins abruptly white, the demarcation curved such that pale area is broadest on central part of fin. Least depth of caudal peduncle 3.1 to 3.3 times in head length. Maximum standard length about 33 cm (Ref 9808).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAcanthurus albipectoralisFamilyAcanthuridae (Surgeonfishes, tangs, unicornfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length33.0Depth range5–20 m (16–66 ft)EnvironmentMarine; reef-associated; depth range 5 - 20 mClimateTropicalDistributionWestern Pacific: Great Barrier Reef and Coral Sea to Tonga.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026