HomeFish encyclopediaRay-finned fishesPerch-like fishCardinalfishesGuam cardinalfish Guam cardinalfish (Apogon guamensis) Scientific name: Apogon guamensis Valenciennes, 1832 The Guam cardinalfish (Apogon guamensis) is a marine fish of the family Apogonidae. Native range: Indo-West Pacific, Red Sea to Samoa, north to Ryukyu Islands, south to the southern Great Barrier Reef. BiologyCommon in reef flats and shallow lagoons, but hiding by day within Acropora thickets and other corals, as well as in holes and crevices and emerging at night to forage on free-swimming invertebratesSource: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApogon guamensisFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length10.0Depth range1–5 m (3–16 ft)EnvironmentMarine; reef-associated; depth range 1 - 5 mClimateTropicalDistributionIndo-West Pacific: Red Sea to Samoa, north to Ryukyu Islands, south to the southern Great Barrier Reef.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