Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Cypriniformes
(Carps) > Cyprinidae
(Minnows or carps) > Leuciscinae
Etymology: Hybognathus: Greek, ybos, -e, -on = curved + Greek, gnathos = jaw; with bulging jaw (Ref. 45335); hayi: Named after the discoverer of this species, O. P. Hay (Ref. 10294). More on author: Jordan.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Temperate; 37°N - 31°N
North America: Ohio and Mississippi River basins from southwestern Indiana and southern Illinois to Louisiana, USA; Gulf Slope drainages from Escambia River in Florida and Alabama, to Sabine River in Texas, USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 12.0 cm TL male/unsexed; (Ref. 86798)
Occurs usually over mud and near detritus in swamps, oxbows, and backwater and pools of sluggish streams (Ref. 86798). Oviparous (Ref. 205), probably open substratum spawners like congeners.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 118484)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00692 (0.00314 - 0.01524), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (23 of 100) .