HomeFish encyclopediaRay-finned fishesSilversidesNeotropical silversidesSlender silverside Slender silverside (Chirostoma attenuatum) Scientific name: Chirostoma attenuatum Meek, 1902 The Slender silverside (Chirostoma attenuatum) is a freshwater fish of the family Atherinopsidae. Native range: Central America, endemic to the Lerma River basin, Mexico. Species factsScientific nameChirostoma attenuatumFamilyAtherinopsidae (Neotropical silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)EnvironmentFreshwater; benthopelagicClimateTropicalDistributionCentral America: endemic to the Lerma River basin, Mexico.Conservation status (IUCN)Endangered (EN) (B1ab(iii,v))Threat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (K=0.20) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026