HomeFish encyclopediaRay-finned fishesPerch-like fishCardinalfishesThree-spot cardinalfish Three-spot cardinalfish (Apogon trimaculatus) Scientific name: Apogon trimaculatus Cuvier, 1828 The Three-spot cardinalfish (Apogon trimaculatus) is a marine fish of the family Apogonidae. Native range: Western Pacific, Ryukyu Islands to Western Australia and the southern Great Barrier Reef, east to Samoa and the Marshall Islands. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8. Juveniles have intense dark markings on a light background. Adults dusky.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApogon trimaculatusFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length14.2Common length12.8Depth range1–34 m (3–112 ft)EnvironmentMarine; reef-associated; depth range 1 - 34 mClimateTropicalDistributionWestern Pacific: Ryukyu Islands to Western Australia and the southern Great Barrier Reef, east to Samoa and the Marshall Islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, 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