Part of the Bonaire National Marine Park, the azure bay of Lac Bay is fringed on the northern side by a unique mangrove forest. The coral dam on the eastern side closes off the bay from the Caribbean Sea. This has created a shallow lagoon, a nursery for coral fish and an attractive breeding ground for migratory and water birds. The seagrass growing in several areas of the bay attracts many turtles. The endangered green sea turtle eats as much as two kilos a day.