Main identification features
Elongate, slender (depth 14% of total length), little compressed; head long (28% total length), narrow, not depressed; knob on snout; eye above mid-line, a little shorter than snout; between eyes 2/3 eye diameter; upper profile gently convex from snout to nape, straight to dorsal origin, gently convex to tail base, lower profile straight; mouth large, upper jaw bone very long, nearly reaching gill opening, broadest in middle, tapering to blunt point at rear; teeth in single series, on lower jaw and front of upper, slightly curved; tongue round tip; 12 short, blunt rakers on 1st gill arch; pelvics fused to form disc, about equal pectoral length; dorsal V + I, 14; 2 dorsals separated by length of snout, rays of 2nd dorsal about equal lengths; anal I, 12-15, long base; pectorals not reaching end of pelvics, ~23 rays; pelvics relatively long, reaching nearly to anus; scales small, imbedded, slightly visible only on sides; no lateral line.
- head narrow; knob on snout
- white spot behind eye
- back: 6 double white spots
- top jaw ~reaches gill opening
Adult: grey to mottled above, whitish below, 6 double white spots along side of back, alternating with about 7 blackish areas, last one on tail base; white spot behind eye; cheeks with 2 dark bands obliquely down and back from eye; dorsal fins with 4 longitudinal series of dark spots; tail with 5-6 wavy bars; pectorals and pelvics plain; anal plain, without dark band.
Size: 8.5 cm.
Habitat: lagoons and river mouths.
Depth: 0-5 m.
Endemic to the Gulf of California (west, north and central-east).
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap).
Depth Range Max: 5 m.
Depth Range Min: 0 m.
Diet: mobile benthic worms; mobile benthic gastropods/bivalves; mobile benthic crustacea (shrimps/crabs).
Eastern Pacific Range: Northern limit=32; Southern limit=25; Western limit=-115; Eastern limit=-111; Latitudinal range=7; Longitudinal range=4.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Estuary; Mud; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only; Sand & gravel.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 8.5 cm.
Regional Endemism: Continent only; Continent; TEP endemic; Continental TEP endemic; Cortez province endemic; All species.
Salinity: Brackish; Non Marine.
Water Column Position: Bottom; Bottom only;
Links to other sites|
- 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.
- 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.
I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.
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Updated: 2018-05-28 04:06:43 gmt