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Acanthemblemaria castroi Stephens and Hobson, 1966
Life   Vertebrata   Fish   Chaenopsidae   Acanthemblemaria

Acanthemblemaria castroi
© Copyright Ross Robertson, 2006 · 12
Acanthemblemaria castroi

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Acanthemblemaria castroi
© Copyright Ross Robertson, 2006 · 12
Acanthemblemaria castroi

Main identification features
  • forehead: no spines
  • head: yellow spots;iris: red
  • body: dark + 2 rows white blotches
Galapagos barnacle-blenny

Dorsal rays XXIII-XXV, 12-14, total dorsal elements 36-38; anal rays II, 24-26; pectoral rays 13 or 14 (usually 13); head spines well developed only on snout and infraorbital bones; top of head behind eyes with rough ridges, but weak spines sometimes present; a single unbranched or branched cirrus above eye.

Primarily reddish brown with about 10 white spots (decreasing in size posteriorly) along middle of side; a second row of somewhat diamond-shaped pale marks along base of dorsal fin; throat and chin with yellow spots; iris red.

Size: grows to 6 cm.

Habitat: dwells in empty barnacle shells on rocky reefs.

In 1-25 m depth; they are seldom seen in the open.

Galápagos Islands.

Abundance: Common.
Cites: Not listed.
Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 25 m.
Depth Range Min: 1 m.
Diet: mobile benthic crustacea (shrimps/crabs); zooplankton; pelagic fish eggs.
Eastern Pacific Range: Northern limit=2; Southern limit=-2; Western limit=-93; Eastern limit=-90; Latitudinal range=4; Longitudinal range=3.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Carnivore; Planktivore.
FishBase Habitat: Reef Associated.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Reef associated (reef + edges-water column & soft bottom); Rocks; Reef (rock &/or coral); Barnacles & worm tubes; Reef only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 6 cm.
Regional Endemism: Island (s) only; Island (s); TEP endemic; TEP oceanic island (s) endemic; Galapagos Islands endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;

Scientific source:

Links to other sites

  • Edgar, G.J. Banks, S., Fariña, J.M., Calvopiña, M. and Martínez, C., 2004., Regional biogeography of shallow reef fish and macro-invertebrate communities in the Galapagos archipelago., Journal of Biogeography, 31:1107-1124.
  • Hastings , P.A. and Robertson, D.R., 1999., Acanthemblemaria atrata and Acanthemblemaria mangognatha, New Species of Eastern Pacific Barnacle Blennies (Chaenopsidae) from Isla del Coco, Costa Rica, and Islas Revillagigedo, Mexico, and their Relationships with other Barnacle Blennies., Revue Francaise de Aquariologie, 25:107-118.
  • Hastings, P.A., 2000., Biogeography of the Tropical Eastern Pacific: distribution and phylogeny of chaenopsid fishes., Zoological Journal of the Linnean Society, 128:319-335.
  • Humann, P., 1993., Reef Fish Identification: Galapagos., New World Publishing:192pp.
  • Lindquist , D. G. and Kotrschal, K. M., 1987., The diets in four Pacific tub( blennies (Acanthemblemaria: Chaenopsidae): Lack of ecological di. vergence in syntopic species., Marine Ecology, 8:327-335.
  • Rosenblatt , R.H. and McCosker, J.E., 1988., A new species of Acanthemblemaria from Malpelo Island, with a key to the Pacific members of the genus (Pisces: Chaenopsidae)., Proc. Calif. Acad. Sci., 45:103-110.
  • Stephens , J.S. Jr , Hobson , E.S. and Johnson, R.K., 1966., Notes on distribution, behavior, and morphological variation in some chaenopsid fishes from the tropical eastern Pacific with descriptions of two new species, Acanthemblemaria castroi and Coralliozetus springeri., Copeia, 1966(3):424-438.


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