This is a park that is almost completely in the sea. It was formed in 1990 and has 5,375 hectares of sea bed and 110 hectares of land. It's on the Pacific litoral between Uvita Point and Piñuela Point in Osa, Province of Puntareanas.

This park includes various habitants both sandy and rocky beach areas, little islands, rocky cliffs, coral reefs and the Punta Uvita blow hole.

The coral reefs are quite porous, with some 50% of their volumn being water filled spaces, channels and cavities, making them ideal to shelter the fish common to reefs.