Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; pelagic-neritic; depth range 0 - 142 m (Ref. 96339). Tropical; 31°N - 14°S, 115°W - 76°W (Ref. 189)
Eastern Pacific: San Juanico Bay, northern Gulf of California southward to Callao, Peru and perhaps further south. The record from Santa Margarita Island on the Pacific coast of Baja California, Mexico is based solely on the now lost type of Stolephorus cultratus.
Length at first maturity / Size / Weight / Age
Maturity: Lm 6.0  range ? - ? cm
Max length : 17.0 cm TL male/unsexed; (Ref. 96339); common length : 8.0 cm TL male/unsexed; (Ref. 55763)
soft rays: 20 - 25. Fairly elongate. Snout long, about 3/4 eye diameter or more; maxilla long, tip pointed, reaching almost to gill opening; gill cover canals of panamensis-type; pseudobranch longer than eye diameter, with 30 or more filaments, extending onto inner face of operculum. Anal fin origin under or just behind base of last dorsal fin ray. Silver stripe along flank about eye diameter.
A schooling species occurring in coastal waters, near shores, entering bays and tolerating some lowering of salinity. Spawns throughout the year, but more intensively in the warmer months. The eggs are oval. The most important tuna baitfish in Manta, Ecuador.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Spawns more intensively in the warmer months (Ref. 189). Spawn in school (Ref. 205).
Whitehead, P.J.P., G.J. Nelson and T. Wongratana, 1988. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (Suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/2):305-579. Rome: FAO. (Ref. 189)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 115941)
Threat to humans
Fisheries: minor commercial; bait: usually
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 17.2 - 28.9, mean 25 (based on 142 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00550 (0.00297 - 0.01015), b=3.07 (2.91 - 3.23), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.5 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Prior r = 0.99, 95% CL = 0.65 - 1.48, Based on 1 stock assessment.
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .