HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesPupfishesBlackfin pupfish Blackfin pupfish (Cyprinodon beltrani) Scientific name: Cyprinodon beltrani ?lvarez, 1949 The Blackfin pupfish (Cyprinodon beltrani) is a freshwater fish of the family Cyprinodontidae. In the aquarium it needs water at 27–32°C (81–90°F). Native range: Central America, Laguna Chichancanab, Mexico. Blackfin pupfish care at a glanceTemperature27–32°C (81–90°F) Species factsScientific nameCyprinodon beltraniFamilyCyprinodontidae (Pupfishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length5.0EnvironmentFreshwater; benthopelagic; non-migratoryClimateTropicalDistributionCentral America: Laguna Chichancanab, Mexico.Conservation status (IUCN)Endangered (EN) (A1abc+2bc, B1+2c, C2b)Threat 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