HomeFish encyclopediaRay-finned fishesPerch-like fishDottybacksBlackmargin dottyback Blackmargin dottyback (Pseudochromis tapeinosoma) Scientific name: Pseudochromis tapeinosoma Bleeker, 1853 The Blackmargin dottyback (Pseudochromis tapeinosoma) is a marine fish of the family Pseudochromidae. Native range: Indo-West Pacific, western coast of Australia to New Caledonia, north to Japan. Reported from the Laccadive Sea in India. BiologyDorsal spines (total): 3; Dorsal soft rays (total): 22; Anal spines: 3; Anal soft rays: 13. Dark brown to dusky yellow with yellow fins with a black submarginal stripe along dorsal fin which continues around the tail.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePseudochromis tapeinosomaFamilyPseudochromidae (Dottybacks)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Depth range2–60 m (7–197 ft)EnvironmentMarine; reef-associated; depth range 2 - 60 mClimateTropicalDistributionIndo-West Pacific: western coast of Australia to New Caledonia, north to Japan. Reported from the Laccadive Sea in India.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026