HomeMarine aquarium fishTangs & surgeonfishJapan surgeonfish Japan surgeonfish (Acanthurus japonicus) Scientific name: Acanthurus japonicus Schmidt, 1931 The Japan surgeonfish (Acanthurus japonicus) is a marine fish of the family Acanthuridae. In the aquarium it needs water at 24–28°C (75–82°F). Native range: Indo-West Pacific, Sulawesi (Indonesia) to Philippines and Ryukyu Islands. Japan surgeonfish care at a glanceTemperature24–28°C (75–82°F) BiologyDorsal spines (total): 9; Dorsal soft rays (total): 28-31; Anal soft rays: 26 - 29. A broad white band extending from lower edge of eye to upper lip. A bright orange band in outer part of soft portion of dorsal fin. Caudal peduncle yellow, shading to black a short distance anteriorly. Base of pectoral fins yellow (Ref 9808).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAcanthurus japonicusFamilyAcanthuridae (Surgeonfishes, tangs, unicornfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length21.0Depth range20 m (66 ft)EnvironmentMarine; reef-associated; depth range ? - 20 m, usually 5 - 15 mClimateTropicalDistributionIndo-West Pacific: Sulawesi (Indonesia) to Philippines and Ryukyu Islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More tangs & surgeonfishBlack surgeonfishAcanthurus gahhmLongnose surgeonfishZebrasoma rostratumYellowtail surgeonfishPrionurus punctatusRazor surgeonfishPrionurus laticlaviusIndian Ocean mimic surgeonfishAcanthurus tristisSailfin tangZebrasoma veliferSee 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