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Thicklip pupfish
Conservation status
Vulnerable  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cyprinodontiformes
Family:	Cyprinodontidae
Genus:	Cyprinodon
Species:	C. labiosus
Binomial name
Cyprinodon labiosus Humphries & R. R. Miller, 1981

The thicklip pupfish (Cyprinodon labiosus), known in Spanish as Cachorrito cangrejero, is a species of fish in the family Cyprinodontidae. The thicklip pupfish is endemic to Laguna Chichancanab in Quintana Roo, Mexico. In almost all places, different Cyprinodon species do not overlap in their range, but there are two notable exceptions and one of these is Lake Chichancanab, which is inhabited by C. labiosus, C. beltrani, C. esconditus, C. maya, C. simus, C. suavium and C. verecundus (the other place where several Cyprinodon species live together are lakes in San Salvador Island, the Bahamas). Among the endemic Cyprinodon species in Lake Chichancanab, only C. beltrani and C. labiosus still occur in some numbers in their habitat, while the remaining are virtually—if not fully—extinct in the wild (at least some of these still survive in captivity). They usually live in a tropical climate with temperatures ranging from 22 to 26 °C (72 to 79 °F). The maximum total length of this fish is 7 centimetres (2.8 in).

References

1. ^ Contreras MacBeath, T.; Schmitter-Soto, J. (2019). "Cyprinodon labiosus". IUCN Red List of Threatened Species. 2019: e.T6154A3104905. doi:10.2305/IUCN.UK.2019-2.RLTS.T6154A3104905.en. Retrieved 15 November 2021.
2. Froese, Rainer; Pauly, Daniel (eds.). "Cyprinodon labiosus". FishBase. May 2023 version.
3. ^ Martin, C.; P.C. Wainwright (2011). "Trophic novelty is linked to exceptional rates of morphological diversification in two adaptive radiations of Cyprinodon pupfish". Evolution. 65 (8): 2197–2212. doi:10.1111/j.1558-5646.2011.01294.x. PMID 21790569.
4. Strecker, U. (2006). "The impact of invasive fish on an endemic Cyprinodon species flock (Teleostei) from Laguna Chichancanab, Yucatan, Mexico". Ecology of Freshwater Fish. 15 (4): 408–418. doi:10.1111/j.1600-0633.2006.00159.x.
5. ^ "Cyprinodon labiosus, Thicklip pupfish". www.fishbase.se. Retrieved 2022-02-20.

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• IUCN Red List vulnerable species
• Cyprinodon
• Endemic fish of Mexico
• Freshwater fish of Mexico
• Endangered fish
• Taxa named by Julian M. Humphries
• Taxa named by Robert Rush Miller
• Endangered biota of Mexico
• Cyprinodontiformes stubs