HomeFish encyclopediaRay-finned fishesPerch-like fishPike-, tube- and flagblenniesBarnacle blenny Barnacle blenny (Acanthemblemaria macrospilus) Scientific name: Acanthemblemaria macrospilus Brock, 1940 The Barnacle blenny (Acanthemblemaria macrospilus) is a marine fish of the family Chaenopsidae. Native range: Eastern Central Pacific, southern Baja California to Acapulco in Mexico and the Revillagigedo Islands. BiologyThis species is distinguished from A. hastingsi in having melanophores on the lower jaws that do not reach all the way to the distal end; it possess a red primary bright head color (vs. orange), and the windowing effect around that color is not present or is less distinct; almost not having melanophores reaching the base of the first dorsal fin and more typically have a dark, round spot or stretched out spot instead of a swath.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAcanthemblemaria macrospilusFamilyChaenopsidae (Pike-, tube- and flagblennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Depth range2–15 m (7–49 ft)EnvironmentMarine; reef-associated; depth range 2 - 15 mClimateTropicalDistributionEastern Central Pacific: southern Baja California to Acapulco in Mexico and the Revillagigedo Islands.Conservation status (IUCN)Least Concern (LC)Threat 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