HomeFish encyclopediaRay-finned fishesSilversidesNeotropical silversidesSmallmouth silverside Smallmouth silverside (Chirostoma chapalae) Scientific name: Chirostoma chapalae Jordan & Snyder, 1899 The Smallmouth silverside (Chirostoma chapalae) is a freshwater fish of the family Atherinopsidae. Native range: North America, endemic to Lerma River basin, Mexico. Species factsScientific nameChirostoma chapalaeFamilyAtherinopsidae (Neotropical silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length14.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionNorth America: endemic to Lerma River basin, Mexico.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceHigh, 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