HomeFish encyclopediaRay-finned fishesPerch-like fishCardinalfishesTransparent cardinalfish Transparent cardinalfish (Apogon crassiceps) Scientific name: Apogon crassiceps Garman, 1903 The Transparent cardinalfish (Apogon crassiceps) is a marine fish of the family Apogonidae. Native range: Indo-Pacific. Replaced by Apogon coccineus from the Red Sea to Persian Gulf and by Apogon erythrinus in the Hawaiian Islands. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8. Resembles A. unicolor but distinguished by fewer spines in the 1st dorsal fin (6 against 7), large scales, and fewer lateral line scales (23 against 25). Body color uniformly dark reddish, each scale mottled with brown. Attains 10 cm TL.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApogon crassicepsFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length2.9Common length4.5Depth range18–55 m (59–180 ft)EnvironmentMarine; reef-associated; depth range 18 - 55 mClimateTropicalDistributionIndo-Pacific. Replaced by Apogon coccineus from the Red Sea to Persian Gulf and by Apogon erythrinus in the Hawaiian 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