Main identification features
- dorsal fin i,6, base yellow
- tail fin base yellow
- flank: 6-8 short black bars and spots
Moderately elongate, compressed; head small, flattened above, snout short, blunt, rounded; eye large, longer than snout; mouth rather wide; outer jaw teeth chisel shaped, hooked and strong, inner teeth in bands, commonly expanded near tip. dorsal I,7; anal II,8; tail rounded to straight; scales large, smooth, 28-30 along mid-side.
Yellow brown, darker on back; opercle and belly silvery; a series of 6-8 short black bars and spots along the upper flank; sometimes round dark spots on lower body; a dark line along underside of tail base from anal fin to tail fin; base of dorsal and tail fins yellowish, rest of fins clear.
Size: grows to 5 cm in both sexes.
Habitat: freshwater streams and brackish lagoons
Depth: 0-2 m.
Eastern Gulf of California – Sonora to Nayarit.
Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos).
Depth Range Max: 2 m.
Depth Range Min: 0 m.
Diet: zooplankton; Insects; detritus.
Eastern Pacific Range: Northern limit=28; Southern limit=23; Western limit=-111; Eastern limit=-106; Latitudinal range=5; Longitudinal range=5.
Egg Type: Live birth; No pelagic larva; No pelagic phase.
Feeding Group: Carnivore; Planktivore; Detritivore.
FishBase Habitat: Bentho-Pelagic.
Global Endemism: East Pacific endemic; Tropical Eastern Pacific (TEP) endemic; All species.
Habitat: Estuary; Freshwater; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 5 cm.
Regional Endemism: TEP endemic; Continental TEP endemic; Cortez + Mexican provinces endemic; Continent only; Continent; All species.
Residency: Resident.
Salinity: Brackish; Freshwater; Non Marine.
Water Column Position: Surface; Mid Water; Bottom;
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- Garman, S., 1895., The cyprinodonts., Mem. Mus. Comp. Zool., 19 (pt 1):1-179.
- Wischnath, L., 1993., Atlas of livebearers of the world., T.F.H. Publications:336pp.
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