HomeMarine aquarium fishAngelfish & butterflyfishMarquesas butterflyfish Marquesas butterflyfish (Chaetodon declivis) Scientific name: Chaetodon declivis Randall, 1975 The Marquesas butterflyfish (Chaetodon declivis) is a marine fish of the family Chaetodontidae. Native range: Eastern Indian Ocean, Christmas Island. Eastern Central Pacific: Line and Marquesan islands. BiologyFound over rocky and sandy bottoms. Oviparous. Form pairs during breeding. Because of its limited distribution and deep dwelling habits, it will probably remain unknown in the aquarium trade.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameChaetodon declivisFamilyChaetodontidae (Butterflyfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length12.0EnvironmentMarine; reef-associatedClimateTropicalDistributionEastern Indian Ocean: Christmas Island. Eastern Central Pacific: Line and Marquesan islands.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More angelfish & butterflyfishPajama cardinalfishSphaeramia nematopteraBicolor butterflyfishPrognathodes dichrousDiagonal butterflyfishChaetodon fasciatusHooded butterflyfishChaetodon larvatusEritrean butterflyfishChaetodon paucifasciatusBluecheek butterflyfishChaetodon semilarvatusSee all angelfish & butterflyfish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026