HomeMarine aquarium fishClownfish & damselfishOnespot demoiselle Onespot demoiselle (Chrysiptera unimaculata) Scientific name: Chrysiptera unimaculata Cuvier, 1830 The Onespot demoiselle (Chrysiptera unimaculata) is a marine fish of the family Pomacentridae. Native range: Indo-West Pacific, Red Sea and East Africa to Fiji, north to Ryukyu Islands, south to the southern Great Barrier Reef. Recently reported from Tonga. BiologyDorsal spines (total): 13; Dorsal soft rays (total): 13-14; Anal spines: 2; Anal soft rays: 12 - 14. Those between Pacific and Indian Ocean are most different. Adults usually plain dark with a black spot at the end of the dorsal fin base and a small orange spot on gill-plate. This species may resemble C. biocellata but never has a pale bar on its side. Usually it has more (19 against 18) pectoral rays and more pored lateral line scales (18 against 17 in upper series).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameChrysiptera unimaculataFamilyPomacentridae (Damselfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length10.0Depth range0–3 m (0–10 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 0 - 3 mClimateTropicalDistributionIndo-West Pacific: Red Sea and East Africa to Fiji, north to Ryukyu Islands, south to the southern Great Barrier Reef. Recently reported from Tonga.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More clownfish & damselfishKing demoiselleChrysiptera rexBowtie damselfishNeoglyphidodon melasBlack-and-gold chromisNeoglyphidodon nigrorisSurge damselfishChrysiptera brownriggiiBlackbar devilPlectroglyphidodon dickiiSapphire devilChrysiptera cyaneaSee all clownfish & damselfish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026