HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesPupfishesSonoyta pupfish Sonoyta pupfish (Cyprinodon eremus) Scientific name: Cyprinodon eremus Miller & Fuiman, 1987 The Sonoyta pupfish (Cyprinodon eremus) is a freshwater fish of the family Cyprinodontidae. Native range: North America, R?o Sonoyta/Quitobaquito Springs. BiologyAn omnivore feeding on plants, insect larvae and nymphs, water mites, ostracods, their own eggs, sponge, mollusc eggs and some other organisms.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCyprinodon eremusFamilyCyprinodontidae (Pupfishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length4.0EnvironmentFreshwater; benthopelagicClimateSubtropicalDistributionNorth America: R?o Sonoyta/Quitobaquito Springs.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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