HomeMarine aquarium fishTangs & surgeonfishStriped-fin surgeonfish Striped-fin surgeonfish (Ctenochaetus marginatus) Scientific name: Ctenochaetus marginatus Valenciennes, 1835 The Striped-fin surgeonfish (Ctenochaetus marginatus) is a marine fish of the family Acanthuridae. Native range: Pacific Ocean, Marshall, Caroline, Kiribati, Tuvalu, Johnston, Marquesas; including Clipperton Atoll, Cocos and Gorgona islands. Society and Line Islands. BiologyDorsal spines (total): 8; Dorsal soft rays (total): 26-29; Anal spines: 3; Anal soft rays: 24 - 26. Lower lip papillate posteriorly. Gill rakers on anterior row 26-29, on posterior row 34-37. Has brilliant blue spots covering the head, body, and pectoral fins and blue longitudinal pinstripes on the dorsal, anal and caudal fins (Ref 1602). Anterior dorsal soft rays longer than posterior (Ref 42056).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCtenochaetus marginatusFamilyAcanthuridae (Surgeonfishes, tangs, unicornfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length27.0Depth range2–18 m (7–59 ft)EnvironmentMarine; reef-associated; depth range 2 - 18 m, usually 9 - 12 mClimateTropicalDistributionPacific Ocean: Marshall, Caroline, Kiribati, Tuvalu, Johnston, Marquesas; including Clipperton Atoll, Cocos and Gorgona islands. Society and Line Islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More tangs & surgeonfishSpotted surgeonfishCtenochaetus strigosusChevron tangCtenochaetus hawaiiensisTomini surgeonfishCtenochaetus tominiensisTwospot surgeonfishCtenochaetus binotatusWhitecheek surgeonfishAcanthurus nigricansPalette surgeonfishParacanthurus hepatusSee 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