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Gobulus hancocki Ginsburg, 1938
SANDTOP GOBY
Sand-top goby

Life   Vertebrata   Fish   Gobiidae   Gobulus

Gobulus hancocki
© Copyright Ross Robertson, 2006 · 12
Gobulus hancocki

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Gobulus hancocki
© Copyright Photographer/SFTEP, 2002 · 0
Gobulus hancocki
Gobulus hancocki
© Copyright Photographer/SFTEP, 2002 · 0
Gobulus hancocki

Gobulus hancocki
© Copyright Photographer/SFTEP, 2002 · 0
Gobulus hancocki
español

Overview
Main identification features
  • upper 1/3 white + dark spots , lower 2/3 dark brown
  • tail fin base - dark crescent;fins clear
  • dorsal fin fins separate
Head noticeably flattened; head pores absent; body slender, compressed; eye small (<80% of snout length); dorsal rays VII + I, 10-11(usually 11), two fins separate; anal rays I, 9-10 (usually 10); pectoral rays 15-17 (usually 16); pelvic fins fused to form flat, plate-like structure, with a small membrane between the pelvic spines; scales entirely absent on head and body.


Dark brown lower 2/3 of head and body, dark pigment reaches well above midline of body; whitish above mottled with brown spots; whitish on belly; dark crescent shaped bar on base of tail fin in most specimens; dorsal, anal and pelvic fins clear.

Size: attains 2.5 cm.

Inhabits sand-rubble bottoms close to reefs.

Depth: 1-20 m.

Central Gulf of California to Colombia, Cocos Island.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos); Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 20 m.
Depth Range Min: 1 m.
Diet: mobile benthic worms; mobile benthic crustacea (shrimps/crabs); mobile benthic gastropods/bivalves.
Eastern Pacific Range: Northern limit=29; Southern limit=3; Western limit=-112; Eastern limit=-78; Latitudinal range=26; Longitudinal range=34.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Reef associated (reef + edges-water column & soft bottom); Sand & gravel; Corals; Reef and soft bottom; Reef (rock &/or coral).
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 2.5 cm.
Regional Endemism: Island (s); Continent; Continent + Island (s); TEP endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • Birdsong , R. S. , Murdy , E. O. and Pezold, F. L., 1988., A study of the vertebral column and median fin osteology in gobioid fishes with comments on gobioid relationships., Bull. Mar. Sci., 42:174-214.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo .  Derechos reservados de los autores y Conservación Internacional.
  • 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 II. Vertebrados - Parte 1., FAO2:647-1200.
  • Galván-Magaña, F., Gutiérrez-Sánchez, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., 2000., The distribution and affinities of the shore fishes of the Baja California Sur lagoons. In Aquatic Ecosystems of Mexico: Status and Scope. Eds. M. Manuwar, S.G. Lawrence, I.F. Manuwar & D.F. Malley. Ecovision World Monograph Series., Backhuys Publishers:383-398.
  • Ginsburg, I., 1933., Descriptions of new and imperfectly known species and genera of gobioid and pleuronectid fishes in the United States National Museum., Proc. U.S. Nat. Mus., 82(20):1-23.
  • Ginsburg, I., 1938., Eight new species of gobioid fishes from the American Pacific coast., Allan Hancock Pacific Expeditions, 2(7):109-121.
  • Hoese , D. F. and Reader, S., 2001., Revision of the eastern Pacific species of Gobulus (Perciformes: Gobiidae), with description of a new species., Revista de Biologia Tropical, 49(Supplement 1):169-176.
  • 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.
  • Rubio, E.A., 1986., Notas sobre la ictiofauna de la Isla de Gorgona, Colombia., Boletin Ecotropica. Univ. Bog. Jorge Tadeo Lozano, 13:86-112.
  • Thomson , D.A. , Findley , L.T. and Kerstitch, A.N., 2000., Reef fishes of the Sea of Cortez., University of Texas Press(Revised Ed.):353.
  • Van der Heiden , A. M. and Findley, L. T., 1988., Lista de los peces marinos del sur de Sinaloa, México., Anales del Centro de Ciencias del Mar y Limnologia de la Universidad Autonoma Nacional de Mexico, 15:209-224.

Acknowledgements

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


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