Riffle chub
Introduction The '''riffle chub''' ('''''Algansea aphanea''''') is a species of freshwater fish in the family Cyprinidae that is endemic to the Armería, Ayutla and Tuxpan river basins in Jalisco and Colima of west-central Mexico. This threatened species is generally found in small rivers and streams in fast-flowing waters that are . It typically is  long.
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