HomeMarine aquarium fishTangs & surgeonfishBlack-spot surgeonfish Black-spot surgeonfish (Acanthurus bariene) Scientific name: Acanthurus bariene Lesson, 1831 The Black-spot surgeonfish (Acanthurus bariene) is a marine fish of the family Acanthuridae. In the aquarium it needs water at 23–29°C (73–84°F). Native range: Indo-West Pacific, Mozambique and Maldives to the western Pacific. Black-spot surgeonfish care at a glanceTemperature23–29°C (73–84°F) BiologyDorsal spines (total): 9; Dorsal soft rays (total): 26-28; Anal spines: 3; Anal soft rays: 25 - 26. Body brown; a round black spot at upper gill opening; dark blue line just below the bases of dorsal and anal fins. Dorsal fin with soft part having longer base than spinous part. Minute scales. Gill rakers in anterior row 19-23, posterior 22-24. A dark brown area surrounding the caudal spine. Large males develop highly convex foreheads that extend beyond the mouth.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAcanthurus barieneFamilyAcanthuridae (Surgeonfishes, tangs, unicornfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length50.0Depth range6–50 m (20–164 ft)EnvironmentMarine; reef-associated; depth range 6 - 50 m, usually 30 - ? mClimateTropicalDistributionIndo-West Pacific: Mozambique and Maldives to the western Pacific.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercial; aquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More tangs & surgeonfishAchilles tangAcanthurus achillesLittle spinefootSiganus spinusBlue-spotted spinefootSiganus corallinusStreamlined spinefootSiganus argenteusMasked spinefootSiganus puellusGolden-lined spinefootSiganus lineatusSee all tangs & surgeonfish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026