Procambarus clarkii
In the waters of the lakes there are also endemic Iberian fishes like the "Rutilus lemmingii", "Luciobarbus guiraonis", Iberian barbel, "Luciobarbus microcephalus", "Squalius pyrenaicus", as well as introduced species, like the common carp, northern pike, largemouth bass and "Gambusia holbrooki". The "Procambarus clarkii" is an introduced species of crayfish that has caused great damage to the local aquatic fauna.