HomeMarine aquarium fishBasslets, cardinalfish & hawkfishRuby cardinalfish Ruby cardinalfish (Apogon coccineus) Scientific name: Apogon coccineus R?ppell, 1838 The Ruby cardinalfish (Apogon coccineus) is a marine fish of the family Apogonidae. Native range: Indo-Pacific, Red Sea and East Africa to the Marquesan and Easter islands, north to southern Japan, south to Lord Howe Island. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8. Semi-transparent and reddish in color.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApogon coccineusFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Depth range8–35 m (26–115 ft)EnvironmentMarine; reef-associated; depth range 8 - 35 mClimateTropicalDistributionIndo-Pacific: Red Sea and East Africa to the Marquesan and Easter islands, north to southern Japan, south to Lord Howe Island.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More basslets, cardinalfish & hawkfishBanggai cardinal fishPterapogon kauderniFragile cardinalfishZoramia fragilisGilbert's cardinalfishZoramia gilbertiThreadfin cardinalfishZoramia leptacanthaTwospot hawkfishAmblycirrhitus bimaculaCoral hawkfishCirrhitichthys oxycephalusSee all basslets, cardinalfish & hawkfish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026