HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsLerma chub Lerma chub (Algansea barbata) Scientific name: Algansea barbata ?lvarez & Cort?s, 1964 The Lerma chub (Algansea barbata) is a freshwater fish of the family Cyprinidae. Native range: North America, endemic to the Lerma River basin, Mexico. Species factsScientific nameAlgansea barbataFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)EnvironmentFreshwater; benthopelagicClimateTropicalDistributionNorth America: endemic to the Lerma River basin, Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026