Posidonia Oceanica represents one of the fundamental natural values in the Mediterranean as it plays an important role in sediment filtration, thus giving the water a unique transparency, helps maintain the quality and oxygenation of the ecosystem by producing oxygen and storing CO2, protects biodiversity by acting as a shelter where more than 400 species of marine plants and 1,000 species of marine animals feed and reproduce, and finally the beached posidonia leaves form quays which prevent coastal erosion.