HomeFish encyclopediaRay-finned fishesPerch-like fishPike-, tube- and flagblenniesGalapagos barnacle blenny Galapagos barnacle blenny (Acanthemblemaria castroi) Scientific name: Acanthemblemaria castroi Stephens & Hobson, 1966 The Galapagos barnacle blenny (Acanthemblemaria castroi) is a marine fish of the family Chaenopsidae. Native range: Southeast Pacific, endemic to the Galapagos Islands. BiologyLives in empty barnacle shells. Often perches in the opening with only the head protruding. Seldom seen in the open. Darts out to nab bits of floating food. Oviparous. Eggs are attached to the walls of the parent's shelter and are brooded by the male parent.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAcanthemblemaria castroiFamilyChaenopsidae (Pike-, tube- and flagblennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Depth range1–23 m (3–75 ft)EnvironmentMarine; reef-associated; depth range 1 - 23 m, usually 6 - 12 mClimateTropicalDistributionSoutheast Pacific: endemic to the Galapagos Islands.Conservation status (IUCN)Vulnerable (VU) (D2)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