HomeFish encyclopediaRay-finned fishesSilversidesNeotropical silversidesAlchichica silverside Alchichica silverside (Poblana alchichica) Scientific name: Poblana alchichica de Buen, 1945 The Alchichica silverside (Poblana alchichica) is a freshwater fish of the family Atherinopsidae. Native range: Central America, Mexico. Species factsScientific namePoblana alchichicaFamilyAtherinopsidae (Neotropical silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)EnvironmentFreshwater; pelagicClimateTropicalDistributionCentral America: Mexico.Conservation status (IUCN)Critically Endangered (CR) (A1ac+2c, B1+2c, 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