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Stegastes arcifrons (Heller and Snodgrass, 1903)
ISLAND MAJOR
Yellowtail gregory

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Stegastes arcifrons
© Copyright Ross Robertson, 2006 · 12
Stegastes arcifrons

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Stegastes arcifrons
© Copyright Ross Robertson, 2006 · 12
Stegastes arcifrons
Stegastes arcifrons
© Copyright Gerald Allen, 2006 · 0
Stegastes arcifrons
español

Overview
Main identification features
  • dark brown, head paler
  • lips and tail: yellow
  • juvenile: brown; rear 1/4 yellow
Dorsal rays XII, 15 (rarely 16); anal rays II, 13 (rarely 12); pectoral rays 20 (rarely 19); lateral-line scales 20 (rarely 19); gill rakers on lower limb of first arch 12 or 13 (rarely 14); greatest body depth 1.8-2.1 in standard length.

Overall dark brown, head and breast lighter, often with violet color on gill cover; distinguished by pale yellowish lips and bright yellow caudal fin; juveniles somewhat similar, but yellow color of tail extends forward onto posteriormost part of body and rear of dorsal and anal fins, also there is a large ocellated black spot near the base of the soft dorsal junction.

Size: to 16 cm.

Habitat: abundant along rocky shores.

Depth: 1-30 m.

Galapagos Islands, Malpelo Island, and Isla del Coco, Isla de la Plata (Ecuador); vagrants on the coast of Costa Rica.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 30 m.
Depth Range Min: 1 m.
Diet: benthic microalgae; mobile benthic crustacea (shrimps/crabs); sessile crustacea; sessile worms.
Eastern Pacific Range: Northern limit=9; Southern limit=-2; Western limit=-93; Eastern limit=-79; Latitudinal range=11; Longitudinal range=14.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Omnivore.
FishBase Habitat: Reef Associated.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Corals; 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: 16 cm.
Regional Endemism: Island (s); Continent; Continent + Island (s); TEP endemic; TEP oceanic island (s) endemic; Multiple oceanic islands endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • 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.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen III. Vertebrados - Parte 2., FAO3:1201-1813.
  • Fowler, H.W., 1944., Results of the Fifth George Vanderbilt Expedition (1941) (Bahamas, Caribbean sea, Panama, Galapagos Archipelago and Mexican Pacific Islands). The Fishes., Acad. Nat. Sci. Philadel., Monographs, 6:57-529.
  • Heller , E. and Snodgrass, R.E., 1903., Papers from the Hopkins Stanford Galapagos expedition, 1898-1899. XV. New fishes., Proc. Wash. Acad. Sci., 5:189-229.
  • Humann, P., 1993., Reef Fish Identification: Galapagos., New World Publishing:192pp.
  • Kendall , W.C. and Radcliffe, L., 1912., The shore fishes. Reports on the scientific results of the expedition to the eastern tropical Pacific, ... by the U.S. Fish Commission steamer ALBATROSS, from October, 1904, to March, 1905, Lieut. Commander L.M. Garret, U.S.N., Commanding. XXV., Mem. Mus. Comp. Zool., 35(3):75-171.
  • Lopez , M. I. and Bussing, W. A., 1982., Lista provisional de los peces marinos de la Costa Rica., Revista de Biologia Tropical, 30(1):5-26.
  • McCosker , J.E. and Rosenblatt, R.H., 1975., Fishes collected at Malpelo Island. In Graham, J.B. (ed.) The Biological Investigation of Malpelo Island, Colombia., Smithsonian Contrib. Zool., 176:91-93.
  • Snodgrass , R. E. and Heller, E., 1905., Papers from the Hopkins Stanford Galapagos expedition, 1898-1899. XVII. Shorefishes of the Revillagigedo, Clipperton, Cocos and Galapagos Island., Proc. Wash. Acad. Sci., 6:333-427.
  • 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.
  • Wellington, G. M. and Victor, B. C., 1989., Planktonic larval duration of one hundred species of Pacific and Atlantic damselfishes (Pomacentridae)., Marine Biology, 101:557-567.

Acknowledgements

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


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