HomeFish encyclopediaRay-finned fishesPerch-like fishButterflyfishesOblique butterflyfish Oblique butterflyfish (Prognathodes obliquus) Scientific name: Prognathodes obliquus Lubbock & Edwards, 1980 The Oblique butterflyfish (Prognathodes obliquus) is a marine fish of the family Chaetodontidae. Native range: Eastern Central Atlantic, known only from St. Paul's Rocks (Brazil). BiologyChocolate brown overall with triangular white patch on upper rear corner of body and adjacent dorsal fin; caudal fin white; lateral line scales silver.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePrognathodes obliquusFamilyChaetodontidae (Butterflyfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Depth range40–100 m (131–328 ft)EnvironmentMarine; demersal; depth range 40 - 100 mClimateTropicalDistributionEastern Central Atlantic: known only from St. Paul's Rocks (Brazil).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