It is the transition zone between the terrestrial environment and the marine world. It is a zone of great dynamism, which in a matter of hours can be flooded or exposed to the air.

Animals adapted to changing environments. These include invertebrates such as snails, crabs, starfish, sea urchins, anemones and small fish.

It provides abundant food for its permanent and temporary inhabitants, such as fish that arrive with the tidal dynamics and some birds. They are also breeding sites for sea turtles, crabs and fish.