HomeFish encyclopediaRay-finned fishesSilversidesNeotropical silversidesScowling silverside Scowling silverside (Chirostoma aculeatum) Scientific name: Chirostoma aculeatum Barbour, 1973 The Scowling silverside (Chirostoma aculeatum) is a freshwater fish of the family Atherinopsidae. Native range: North America, endemic to the Lerma River basin. Species factsScientific nameChirostoma aculeatumFamilyAtherinopsidae (Neotropical silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)EnvironmentFreshwater; benthopelagicClimateTropicalDistributionNorth America: endemic to the Lerma River basin.Conservation status (IUCN)Not EvaluatedThreat 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