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Semicossyphus darwini (Jenyns, 1842)
GALPAGOS SHEEPHEAD WRASSE
Galapagos sheephead

Life   Vertebrata   Fish   Labridae   Semicossyphus

Semicossyphus darwini
© Copyright Gerald Allen, 2006 · 0
Semicossyphus darwini

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Semicossyphus darwini
© Copyright Gerald Allen, 2006 · 0
Semicossyphus darwini
español

Overview
Main identification features
  • reddish/ blue-grey + yellow patch behind operculum
  • chin white
Dorsal rays XII,10; anal rays III,11 or 12; pectoral rays 18; scales relatively small, 53-56 pored scales in lateral line; 2 pairs of enlarged, curved canines at front of each jaw; rear of upper jaw with moderately enlarged canine on each side.

Initial phase red with large yellow patch just behind head and black spot at front of dorsal fin; terminal phase bluish grey with large yellow patch behind head; both phases with white chin.

Maximum size to about 70 cm.

Habitat: found along rocky shores of the cooler southern and western regions of the Galapagos.

Depth: 3-100 m.

Ecuador to central Peru, and Galapagos Islands.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo); South Temperate (Peruvian Province ).
Depth Range Max: 100 m.
Depth Range Min: 3 m.
Diet: mobile benthic gastropods/bivalves; mobile benthic crustacea (shrimps/crabs); sessile molluscs; sea-stars/cucumbers/urchins; sessile crustacea.
Eastern Pacific Range: Northern limit=2; Southern limit=-20; Western limit=-93; Eastern limit=-70; Latitudinal range=22; Longitudinal range=23.
Egg Type: Pelagic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Reef Associated.
Global Endemism: TEP non-endemic; East Pacific endemic; All species.
Habitat: Reef associated (reef + edges-water column & soft bottom); Rocks; Reef (rock &/or coral); Reef only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 70 cm.
Regional Endemism: Island (s); Continent; Temperate Eastern Pacific, primarily; Continent + Island (s); Tropical Eastern Pacific (TEP) non-endemic; Peruvian province, primarily; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • Allen , G.R. and Robertson, D.R., 1994., Fishes of the Tropical Eastern Pacific., Crawford House Press Pty Ltd:1-332.
  • Baldwin , C. C. and McCosker, J. E., 2001., Wrasses of the Galápagos Islands, with the description of a new deepwater species of Halichoeres (Perciformes: Labridae)., Revista de Biologia Tropical, 49(Supplement 1):89-100.
  • Breder, C.M. Jr., 1936., Scientific results of the second oceanographic expedition of the "Pawnee" 1926. Heterosomata to Pediculati from Panama to Lower California., Bull. Bingham Oceanogr. Collect. Yale Univ., 2(3):1-56.
  • Béarez, P., 1996., Lista de los Peces Marinos del Ecuador Continental., Revista de Biologia Tropical, 44:731-741.
  • 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.
  • Gomon, M.F., 1997., Relationships of fishes of the labrid tribe Hypsigenyini., Bull. Mar. Sci., 60:789-871.
  • Hildebrand, S.F., 1946., A descriptive catalog of the shore fishes of Peru., Bull. U.S. Nat. Mus., 189:1-530.
  • Humann, P., 1993., Reef Fish Identification: Galapagos., New World Publishing:192pp.
  • Jenyns, L., 1842., Fish. In: C. Darwin, ed. The zoology of the voyage of H.M.S. 'Beagle' under the command of Captain Fitzroy, R.N. during the years 1832 to 1836. Issued in 4 parts., Smith, Elder & Co.:i-xvi + 1-172.
  • Jimenez-Prado, P., Béarez, P., 2004., Peces marinos del Ecuador continental / Marine fishes of continental Ecuador., SIMBIOE/NAZCA/IFEA tomo 1 y 2.
  • Jordan , D.S. and Evermann, B.W., 1898., The fishes of North and Middle America: a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Part II., Bull. U.S. Nat. Mus., 47:1241-2183.
  • McCosker , J.E. and Rosenblatt, R.H., 1985., The inshore fish fauna of the Galápagos Islands. In Key Environments-Galápagos, ed. R. Perry., Pergamon Press:133-144.
  • Molina, L., Danulat, E., Oviedo, M., González, J.A., 2004., Guía de especies de interés pesquero en la Reserva Marina de Galápagos., Fundación Charles Darwin / Agencia Espeñola de Cooperación Internacional / Dirección Parque Nacional Galápagos, 115pp.
  • Victor , B. C. , Wellington , G. M. , Robertson , D. R. and Ruttenberg, B., 2001., The effect of the EL Niño-Southern oscilation event in the distribution of reef-associated labrid fishes in the Eastern Pacific ocean., Bull. Mar. Sci., 69:279-288.
  • Victor, B. C. and Wellington, G. M., 2000., Endemism and the pelagic larval duration of reef fishes in the eastern Pacific Ocean., Marine Ecology Progress Series, 205:241-248.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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