HomeFish encyclopediaRay-finned fishesPerch-like fishDamselfishesGiant damselfish Giant damselfish (Microspathodon dorsalis) Scientific name: Microspathodon dorsalis Gill, 1862 The Giant damselfish (Microspathodon dorsalis) is a marine fish of the family Pomacentridae. Native range: Eastern Pacific, central Gulf of California to Malpelo Island (Colombia), including the Revillagigedo, Cocos and the Galapagos islands. BiologyDorsal spines (total): 12; Dorsal soft rays (total): 15-16; Anal spines: 2; Anal soft rays: 13 - 14Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMicrospathodon dorsalisFamilyPomacentridae (Damselfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length31.0Depth range1–5 m (3–16 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 1 - 5 mClimateTropicalDistributionEastern Pacific: central Gulf of California to Malpelo Island (Colombia), including the Revillagigedo, Cocos and the Galapagos islands.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (tmax=20) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026