HomeMarine aquarium fishOther marine fishRosy blenny Rosy blenny (Malacoctenus macropus) Scientific name: Malacoctenus macropus Poey, 1868 The Rosy blenny (Malacoctenus macropus) is a marine fish of the family Labrisomidae. Native range: Western Atlantic, Bermuda, southern Florida (USA), Bahamas, and Yucatan (Mexico) to northern South America. BiologyDorsal spines (total): 21 - 22; Dorsal soft rays (total): 10-11; Anal spines: 2; Anal soft rays: 20 - 21. No conspicuous spots or ocelli. It is the only member of its genus that does not have a conspicuous color pattern. Female with irregular brown blotches dorsally on body, uniformly speckled with small whitish spots, the dorsal fin with many small dark reddish spots; postorbital head and body of males covered with small red spots and blotches; no dark spots in dorsal fin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMalacoctenus macropusFamilyLabrisomidae (Labrisomids)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length5.5Depth range0–8 m (0–26 ft)EnvironmentMarine; reef-associated; depth range 0 - 8 m, usually 0 - 2 mClimateSubtropicalDistributionWestern Atlantic: Bermuda, southern Florida (USA), Bahamas, and Yucatan (Mexico) to northern South America.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercial More other marine fishSaddled blennyMalacoctenus triangulatusHairy blennyLabrisomus nuchipinnisGiant kelpfishHeterostichus rostratusWrasse blennyHemiemblemaria simulusBlackfin blennyParaclinus nigripinnisCheckered blennyStarksia ocellataSee all other marine fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026