HomeFish encyclopediaRay-finned fishesPerch-like fishSurgeonfishes, tangs, unicornfishesBlack-barred surgeonfish Black-barred surgeonfish (Acanthurus polyzona) Scientific name: Acanthurus polyzona Bleeker, 1868 The Black-barred surgeonfish (Acanthurus polyzona) is a marine fish of the family Acanthuridae. Native range: Western Indian Ocean, known only from Mauritius, R?union, Madagascar, and the Comoro Islands. Species factsScientific nameAcanthurus polyzonaFamilyAcanthuridae (Surgeonfishes, tangs, unicornfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length11.0EnvironmentMarine; reef-associatedClimateTropicalDistributionWestern Indian Ocean: known only from Mauritius, R?union, Madagascar, and the Comoro Islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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