Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Gerreidae
Etymology: Eugerres: Greek, eu = good, well + Latin, gerres = a kind of anchovies; cited by Plinius; castroaguirrei: Named for the late Dr. José Luis Castro Aguirre, who made several important contributions to our understanding of Mexican fish fauna.
Environment / Climate / Range
Freshwater; pelagic. Tropical, preferred ?
North America: Ríos Grijalva-Usumacinta basin in the highlands of Chiapas and Tabasco, Mexico and northern Guatemala.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 24.2 cm SL male/unsexed; (Ref. 93806); max. published weight: 347.00 g (Ref. 93806)
Morphology | Morphometrics
soft rays: 8. This species is distinguished from its congeners (except E. mexicanus ) by the following characters: body oblong and laterally ticker (vs. deep and laterally compressed); dorsal-fin origin posterior to the insertion of the pectoral and pelvic fins (vs. anterior to the insertion of the pectoral
and pelvic fins); differs from E. mexicanus) in having the length of second dorsal-fin spine 23.2-34.2% SL (vs. 18.9-43.3% SL); depressed second dorsal-spine reaching base of third or fourth dorsal-fin rays; length of second anal-fin spine 11.1-20.6% SL (vs. 16.7-30.2% SL); depressed second anal-fin spine reaching base of third or fourth anal fin-rays and not reaching the distal point of last anal-fin ray; orbit diameter 23.3-31.5% HL (vs. 26.5-45.3% SL); pelvic-fin spine 49.7-65.0% SL (vs. 42.3-78.2% SL) in the length of first pelvic-fin ray; lower lips ventrally extending to midpoint of eye (vs. ventrally not reaching the anterior margin of eye) (Ref. 93806).
Collected from below surface in channel with sandy-slime bottom (pH 8.0, conductivity 478 µÊS/cm, dissolved solids 242 mg/l, dissolved oxygen 6.9 mg/l, and 26°C) using a 90 cm seine net. Food fish (Ref. 93806).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
González-Acosta, A.F. and R. Rodiles-Hernández, 2013. New species of Eugerres from the Usumacinta Province, México and Guatemala with a redescription of E. mexicanus (Steindachner, 1863) (Teleostei: Gerreidae). Neotrop. Ichthyol. 11(2):307-318. (Ref. 93806)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01514 (0.00669 - 0.03426), b=3.00 (2.82 - 3.18), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.4 ±0.5 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.).
Vulnerability (Ref. 59153
): Low vulnerability (25 of 100) .