HomeFish encyclopediaRay-finned fishesSawbelliesSquirrelfishes, soldierfishesBlackfin squirrelfish Blackfin squirrelfish (Neoniphon opercularis) Scientific name: Neoniphon opercularis Valenciennes, 1831 The Blackfin squirrelfish (Neoniphon opercularis) is a marine fish of the family Holocentridae. Native range: Indo-Pacific, East Africa to the Tuamoto Islands, north to the Ryukyu Islands, south to New Caledonia. BiologyDorsal spines (total): 11; Dorsal soft rays (total): 12-14; Anal spines: 4; Anal soft rays: 8 - 9. Body iridescent silvery with dark red or black mark on each scale. Spinous portion of dorsal fin black; soft dorsal, anal and caudal fins reddish yellow; pectoral fins pink, pelvic fins white. Lower jaw strongly projecting.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNeoniphon opercularisFamilyHolocentridae (Squirrelfishes, soldierfishes)OrderBeryciformes (Sawbellies)ClassActinopterygii (Ray-finned fishes)Maximum length35.0Common length23.0Depth range20 m (66 ft)EnvironmentMarine; reef-associated; depth range 20 - ? mClimateTropicalDistributionIndo-Pacific: East Africa to the Tuamoto Islands, north to the Ryukyu Islands, south to New Caledonia.Conservation status (IUCN)Not EvaluatedThreat to humansVenomousUsesFisheries: minor commercialResilienceHigh, 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