HomeFish encyclopediaRay-finned fishesPerch-like fishButterflyfishesGueze's butterflyfish Gueze's butterflyfish (Prognathodes guezei) Scientific name: Prognathodes guezei Maug? & Bauchot, 1976 The Gueze's butterflyfish (Prognathodes guezei) is a marine fish of the family Chaetodontidae. Native range: Western Indian Ocean, Comoros, R?union, and Mauritius. BiologyWhite overall with two broad black bars on sides extending onto dorsal fin; narrower black bar from dorsal fin origin, through eye, to snout; darkened rear margin of dorsal and anal fins, and black bar across tail base.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePrognathodes guezeiFamilyChaetodontidae (Butterflyfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length11.0Depth range80 m (262 ft)EnvironmentMarine; reef-associated; depth range 80 - ? m, usually 100 - ? mClimateTropicalDistributionWestern Indian Ocean: Comoros, R?union, and Mauritius.Conservation status (IUCN)Data deficient (DD)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