There are now 15 small lakes in the group: There are a variety of birds in the lake shores: ducks, like the red-crested pochard, common pochard, mallard and tufted duck, as well as the Eurasian coot, common moorhen, great reed warbler, bearded reedling, purple heron, little bittern and egrets.

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.

[3] The Procambarus clarkii is an introduced species of crayfish that has caused great damage to the local aquatic fauna.

[5] The protected area of the Lagunas de Ruidera Natural Park includes not only the lakes but also the tributary valley of San Pedro.

The natural park acts as a buffer zone to the core area of the biosphere reserve, the Tablas de Daimiel wetlands.