HomeFish encyclopediaRay-finned fishesPerch-like fishButterflyfishesOman butterflyfish Oman butterflyfish (Chaetodon dialeucos) Scientific name: Chaetodon dialeucos Salm & Mee, 1989 The Oman butterflyfish (Chaetodon dialeucos) is a marine fish of the family Chaetodontidae. Native range: Western Indian Ocean, known only from Oman. BiologyDorsal spines (total): 12; Dorsal soft rays (total): 21-22; Anal spines: 3; Anal soft rays: 19; Vertebrae: 24. Caudal fin slightly rounded.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameChaetodon dialeucosFamilyChaetodontidae (Butterflyfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length18.0Depth range1–10 m (3–33 ft)EnvironmentMarine; reef-associated; depth range 1 - 10 mClimateTropicalDistributionWestern Indian Ocean: known only from Oman.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026