HomeFish encyclopediaRay-finned fishesPerch-like fishCardinalfishesBlackvent cardinalfish Blackvent cardinalfish (Apogon melanoproctus) Scientific name: Apogon melanoproctus Fraser & Randall, 1976 The Blackvent cardinalfish (Apogon melanoproctus) is a marine fish of the family Apogonidae. Native range: Western Central Pacific, Solomon Islands and Papua New Guinea. BiologyDorsal spines (total): 6 - 7; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8 - 9. Semi-transparent, closely resembles A. dispar, differing by having a black area around the anus.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApogon melanoproctusFamilyApogonidae (Cardinalfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length4.0Depth range18–37 m (59–121 ft)EnvironmentMarine; reef-associated; depth range 18 - 37 mClimateTropicalDistributionWestern Central Pacific: Solomon Islands and Papua New Guinea.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