HomeFish encyclopediaRay-finned fishesSilversidesNeotropical silversidesGuatemala silverside Guatemala silverside (Atherinella guatemalensis) Scientific name: Atherinella guatemalensis G?nther, 1864 The Guatemala silverside (Atherinella guatemalensis) is a freshwater fish of the family Atherinopsidae. Native range: Eastern Central Pacific, Zacatula, Mexico to Salina de Acap?n, Guatemala. BiologyCommon in fresh and brackish waters, such as in rivers, estuaries, and coastal lagoons.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAtherinella guatemalensisFamilyAtherinopsidae (Neotropical silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length7.5EnvironmentMarine; freshwater; brackish; pelagic-neriticClimateTropicalDistributionEastern Central Pacific: Zacatula, Mexico to Salina de Acap?n, Guatemala.Conservation status (IUCN)Least Concern (LC)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