HomeFish encyclopediaRay-finned fishesSawbelliesSquirrelfishes, soldierfishesKai soldierfish Kai soldierfish (Ostichthys kaianus) Scientific name: Ostichthys kaianus G?nther, 1880 The Kai soldierfish (Ostichthys kaianus) is a marine fish of the family Holocentridae. Native range: Indian Ocean, Reunion and northwestern Australia. Weston Pacific: Indonesia and New Guinea, north to the Ryukyu Islands, south to northern Australia. BiologyDorsal spines (total): 12; Dorsal soft rays (total): 13; Anal spines: 4; Anal soft rays: 11. Body red, with a series of silvery white streaks forming a longitudinal white line along each row of scales, fins reddish white.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOstichthys kaianusFamilyHolocentridae (Squirrelfishes, soldierfishes)OrderBeryciformes (Sawbellies)ClassActinopterygii (Ray-finned fishes)Maximum length36.0Common length25.0Depth range310–640 m (1017–2100 ft)EnvironmentMarine; bathydemersal; depth range 310 - 640 mClimateDeep-waterDistributionIndian Ocean: Reunion and northwestern Australia. Weston Pacific: Indonesia and New Guinea, north to the Ryukyu Islands, south to northern Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceLow, minimum population doubling time 4.5 - 14 years (Assuming tmax>10) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026