HomeMarine aquarium fishTangs & surgeonfishElongate unicornfish Elongate unicornfish (Naso lopezi) Scientific name: Naso lopezi Herre, 1927 The Elongate unicornfish (Naso lopezi) is a marine fish of the family Acanthuridae. BiologyDorsal spines (total): 5; Dorsal soft rays (total): 27-30; Anal spines: 2; Anal soft rays: 26 - 30. Lacks a horn, has numerous black close-set spots on the upper half of its body and tail, and is white ventrally. Body elongate, its depth 3.3 to 3.7 times in SL (Ref 9808).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNaso lopeziFamilyAcanthuridae (Surgeonfishes, tangs, unicornfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length60.0Depth range6–20 m (20–66 ft)EnvironmentMarine; reef-associated; depth range 6 - 20 mClimateTropicalDistributionWestern Pacific: southern Honshu, Japan to the Great Barrier Reef and New Caledonia. Reported from the Similan Islands in the Andaman Sea and Guam. Recently recorded from Tonga.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 & surgeonfishSpotted unicornfishNaso brevirostrisHumpback unicornfishNaso brachycentronBignose unicornfishNaso vlamingiiWhitemargin unicornfishNaso annulatusYellow tangZebrasoma flavescensPalette 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