HomeMarine aquarium fishTangs & surgeonfishDoubleband surgeonfish Doubleband surgeonfish (Acanthurus tennentii) Scientific name: Acanthurus tennentii G?nther, 1861 The Doubleband surgeonfish (Acanthurus tennentii) is a marine fish of the family Acanthuridae. In the aquarium it needs water at 24–28°C (75–82°F). Native range: Indian Ocean, East Africa to Sri Lanka and the Lesser Sunda Islands of southern Indonesia. The Red Sea record by Dor (1984, ) is an error. Doubleband surgeonfish care at a glanceTemperature24–28°C (75–82°F) BiologyDorsal spines (total): 9; Dorsal soft rays (total): 23-24; Anal spines: 3; Anal soft rays: 22 - 23. Brown in color, specimens up to 12 cm SL with black horseshoe mark on shoulder region breaking into 2 horizontal curved bands in larger specimens; caudal spine surrounded by a black area which is then surrounded by a bluish white area; caudal fin with a white posterior border.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAcanthurus tennentiiFamilyAcanthuridae (Surgeonfishes, tangs, unicornfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length31.0Common length25.0Depth range1–25 m (3–82 ft)EnvironmentMarine; reef-associated; depth range 1 - 25 m, usually 3 - 25 mClimateTropicalDistributionIndian Ocean: East Africa to Sri Lanka and the Lesser Sunda Islands of southern Indonesia. The Red Sea record by Dor (1984, ) is an error.Conservation status (IUCN)Not EvaluatedThreat to humansReports of ciguatera poisoningUsesFisheries: commercial; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More tangs & surgeonfishLined surgeonfishAcanthurus lineatusPowderblue surgeonfishAcanthurus leucosternonConvict surgeonfishAcanthurus triostegusEyestripe surgeonfishAcanthurus dussumieriYellowfin surgeonfishAcanthurus xanthopterusStriated surgeonfishCtenochaetus striatusSee 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