HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsPapaloapan chub Papaloapan chub (Notropis moralesi) Scientific name: Notropis moralesi de Buen, 1955 The Papaloapan chub (Notropis moralesi) is a freshwater fish of the family Cyprinidae. Native range: North America, Mexico. Species factsScientific nameNotropis moralesiFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)EnvironmentFreshwater; benthopelagicClimateTropicalDistributionNorth America: Mexico.Conservation status (IUCN)Critically Endangered (CR) (C2b)Threat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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