This is one of the most vast and important wetland in the western Mediterranean. It also holds one of the most important fishing grounds for fisheries. It has international importance for the flora, especially halophilous and aquatic communities including a large number of rare and threatened species. Several endemic and threatened fish species can be found here. Particularly important is the waterbird community reaching 56000 breeding pairs of several species and more than 200000 individuals wintering here, including species coming from northern Europe. Among the breeding species, the site holds more than 60% of total world population of the Audouin's gull, a threatened endemic seabird of the Mediterranean region.
