HomeMarine aquarium fishAngelfish & butterflyfishPacific double-saddle butterflyfish Pacific double-saddle butterflyfish (Chaetodon ulietensis) Scientific name: Chaetodon ulietensis Cuvier, 1831 The Pacific double-saddle butterflyfish (Chaetodon ulietensis) is a marine fish of the family Chaetodontidae. Native range: Indo-Pacific, Cocos-Keeling Islands to the Tuamoto Islands, north to Japan. BiologyDorsal spines (total): 12; Dorsal soft rays (total): 23-25; Anal spines: 3 - 4; Anal soft rays: 19 - 21. Easily recognized on color and distinguished from sibling by white color between the black saddles.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameChaetodon ulietensisFamilyChaetodontidae (Butterflyfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Depth range2–30 m (7–98 ft)EnvironmentMarine; reef-associated; depth range 2 - 30 mClimateTropicalDistributionIndo-Pacific: Cocos-Keeling Islands to the Tuamoto Islands, north to Japan.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More angelfish & butterflyfishPajama cardinalfishSphaeramia nematopteraTeardrop butterflyfishChaetodon unimaculatusMelon butterflyfishChaetodon trifasciatusChevron butterflyfishChaetodon trifascialisVagabond butterflyfishChaetodon vagabundusHawaiian butterflyfishChaetodon tinkeriSee 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