Hydrophytes found within the lake itself include Myriophyllum verticillatum, M. spicatum, Ceratophyllum submersum, Potamogeton pectinatus, P. coloratus, P. gramineus, P. nodosus, P. pusillus, P. lucens, Ranunculus trichophyllus, R. peltatus baudoti, Polygonum amphibium and Utricularia australis.

The shallow shores of the lake are home to plants species including Schoenoplectus lacustris, common reed, Typha angustifolia, Cladium mariscus.

Due to the existence of a salt spring near the lake, species found in saline areas such as Juncus acutus, Juncus gerardi, Spergularia marina, Parapholis incurvaand Plantago coronopus are also present.

[5] According to a study by the Basque Water Agency [es], four species of fish are present in the lake.

Only the tench is autochthonous; while the largemouth bass, Eurasian carp and the pumpkinseed are introduced.