HomeFish encyclopediaRay-finned fishesPerch-like fishCardinalfishesWeedy cardinalfish Weedy cardinalfish (Foa fo) Scientific name: Foa fo Jordan & Seale, 1905 The Weedy cardinalfish (Foa fo) is a marine fish of the family Apogonidae. Native range: Indo-Pacific, Maldives to the Society Islands, north to the Philippines, south to Rapa. BiologyDorsal spines (total): 7 - 8; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameFoa foFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.5Depth range0–82 m (0–269 ft)EnvironmentMarine; reef-associated; depth range 0 - 82 mClimateTropicalDistributionIndo-Pacific: Maldives to the Society Islands, north to the Philippines, south to Rapa.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