HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesPupfishesBoxer pupfish Boxer pupfish (Cyprinodon simus) Scientific name: Cyprinodon simus Humphries & Miller, 1981 The Boxer pupfish (Cyprinodon simus) is a freshwater fish of the family Cyprinodontidae. Native range: Central America, Laguna Chichancanab, Mexico. Species factsScientific nameCyprinodon simusFamilyCyprinodontidae (Pupfishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length4.5EnvironmentFreshwater; benthopelagic; non-migratoryClimateTropicalDistributionCentral America: Laguna Chichancanab, Mexico.Conservation status (IUCN)Endangered (EN) (A1abc+2bc, 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