Nazas chub
The Nazas chub is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which includes the daces, chubs, Eurasian minnows and related species. This fish is endemic to Mexico where it is found in the endorheic drainage systems of the Nazas and the Aguanaval basin, which flow into the Bolsón [de Mapimí], in the States of Coahuila, Durango and Zacatecas.