The riffle chub ( Algansea aphanea) is a species of freshwater fish in the family Cyprinidae that is endemic to the ArmerÃa, Ayutla River and Tuxpan river basins in Jalisco and Colima of west-central Mexico. (2025). 9786071640871 ISBN 9786071640871 This threatened species is generally found in small rivers and streams in fast-flowing waters that are . It typically is long. Categories: Algansea, Fish Described In 1978, Freshwater Fish Of Mexico, Endemic Fish Of Mexico