HomeFish encyclopediaRay-finned fishesPerch-like fishCardinalfishesIridescent cardinalfish Iridescent cardinalfish (Apogon kallopterus) Scientific name: Apogon kallopterus Bleeker, 1856 The Iridescent cardinalfish (Apogon kallopterus) is a brackish-water fish of the family Apogonidae. BiologyOccurs in clear water lagoon patch reefs and seaward reefs from the lower surge zone to a depth of 45 m. Benthopelagic. Generally found singly in crevices. Feeds at night on small benthic and free-swimming crustaceansSource: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApogon kallopterusFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Depth range3–158 m (10–518 ft)EnvironmentMarine; brackish; reef-associated; depth range 3 - 158 mClimateTropicalDistributionIndo-Pacific: Red Sea south to Algoa Bay, South Africa and east to the Line, Marquesan, and Pitcairn islands, north to southern Japan and the Hawaiian Islands, south to New Zealand and Rapa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: 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