Marbled swordtail
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The marbled swordtail (Xiphophorus meyeri) is a species of freshwater fish in the family Poeciliidae. It was endemic to the Rio Salado system (itself a part of the Rio Grande basin) in Coahuila, northeastern Mexico.[1][2] It was restricted to springs, connected creeks and pools in waters with a pH slightly above neutral and temperatures of Template:Cvt, with captive studies indicating that the optimum temperature is around Template:Cvt.[3][2][4]
The marbled swordtail is considered extinct in the wild by the IUCN with the last wild record in 1997, meaning that it survives only in captivity.[3] Captive populations are maintained at the Xiphophorus Genetic Stock Center, Texas State University, United States,[3] and by XNP conservation project members, which include public aquariums, universities and private aquarists in several European countries and the United States.[5][6][7] The marbled swordtail shares the title as northernmost naturally distributed Xiphophorus with the closely related Monterrey platyfish (X. couchianus) and northern platyfish (X. gordoni).[2][8] The specific name of this species honours the German ichthyologist Manfred K. Meyer.[9]
References
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