HomeFish encyclopediaRay-finned fishesPerch-like fishCardinalfishesRifle cardinal Rifle cardinal (Apogon kiensis) Scientific name: Apogon kiensis Jordan & Snyder, 1901 The Rifle cardinal (Apogon kiensis) is a brackish-water fish of the family Apogonidae. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8. A mid-base stripe runs from the snout to the caudal fin edge.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApogon kiensisFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length8.0Depth range0–50 m (0–164 ft)EnvironmentMarine; brackish; reef-associated; depth range 0 - 50 mClimateTropicalDistributionNorthwest Pacific: Korea, Japan, Hong Kong and Taiwan. Reports from the Indian Ocean are based on specimens of Apogon bryx and those from the Philippines by Fowler and Bean (1930) are Apogon fasciatus.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, 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