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Colpichthys regis (Jenkins and Evermann, 1889)
FALSE GRUNION
Life   Vertebrata   Fish   Atherinopsidae   Colpichthys

Colpichthys regis
© Copyright Ross Robertson, 2006 · 12
Colpichthys regis

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Overview
Main identification features
  • 1st dorsal fin origin before anus
  • 6-10 scales between 1st dorsal fin and 2nd dorsal fin
  • mouth partly under snoutteeth - asymetric double point
  • pectoral long
  • lateral scales 46-57
Body deep and strongly compressed; head depressed and broadly flattened above, its top profile ~straight; eye large (= snout); mouth partly below snout; top jaw not extendible; 15-19 short, compressed, lower gill rakers, the inner border of the lower half of the 1st raker is serrated; jaw teeth with double, asymmetrical points; hairlike teeth inside throat; dorsal fin V-VII + 11, origin of 1st dorsal before anus, much closer to angle of operculum than to base of tail; anal I, 22; pectoral fins long (1.25-1.5X head length); 4 rows of scales on cheeks; 46-57 lateral scales; 6-10 scales between dorsal fins.


Color: Pale, flank with a 1 scale wide silver stripe, bordered above by a dark line.


Reaches 15cm

Found in coastal areas and lagoons and mangroves.

Depth range 0-4m

Endemic to the upper Gulf of California


Attributes
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap).
Depth Range Max: 4 m.
Depth Range Min: 0 m.
Diet: zooplankton; pelagic fish larvae; pelagic fish eggs.
Eastern Pacific Range: Northern limit=32; Southern limit=27; Western limit=-115; Eastern limit=-110; Latitudinal range=5; Longitudinal range=5.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Planktivore.
FishBase Habitat: Pelagic.
Global Endemism: East Pacific endemic; TEP non-endemic; All species.
Habitat: Estuary; Mangrove; Water column.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 15 cm.
Regional Endemism: Continent only; Northern Gulf of California endemic; Continent; Temperate Eastern Pacific, primarily; Tropical Eastern Pacific (TEP) non-endemic; All species.
Residency: Vagrant.
Salinity: Marine; Brackish.
Water Column Position: Surface; Near Surface; Water column only;


Names
Scientific source:

Links to other sites

References
  • Castro-Aguirre, J.L., 1999., Ictiofauna estuarino-lagunar y vicaria de México., Editorial Limusa S.A. de C.V.: 1-629pp.
  • 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.
  • Jenkins , O.P. and Evermann, B.W., 1889., Description of eighteen new species of fishes from the Gulf of California., Proc. U.S. Nat. Mus., 11:137-158.

Acknowledgements

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


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