HomeFish encyclopediaRay-finned fishesPerch-like fishCardinalfishesSwallowtail cardinalfish Swallowtail cardinalfish (Rhabdamia cypselurus) Scientific name: Rhabdamia cypselurus Weber, 1909 The Swallowtail cardinalfish (Rhabdamia cypselurus) is a marine fish of the family Apogonidae. Native range: Indo-West Pacific, East Africa to the Marshall Islands, north to Ryukyu Islands, south to New Guinea. Recently reported from Tonga. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 9Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameRhabdamia cypselurusFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Depth range3–13 m (10–43 ft)EnvironmentMarine; reef-associated; depth range 3 - 13 mClimateTropicalDistributionIndo-West Pacific: East Africa to the Marshall Islands, north to Ryukyu Islands, south to New Guinea. Recently reported from Tonga.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