 The islands are contained within the Tamoios Environmental Protection Area (APA), created in 1982.The island (and APA) contains the Aventureiro Sustainable Development Reserve, created in 2014 from the former Aventureiro Marine State Park, which was integrated with the Praia do Sul Biological Reserve.62.5% of the island is covered by the Ilha Grande State Park, making a total of 87% of the island protected.