Aquatic Preserves are sovereign submerged lands protected under the Aquatic Preserve Act of 1975. There are 41 aquatic preserves in Florida totaling about 2.7 million acres. The preserves protect bird rookeries, fish nurseries, freshwater springs, salt marshes, mangroves and sea grass meadows. Some preserves contain cultural heritage sites of civilization that lived there for a time. While the preserves protect the beauty and landscape, visitors are encouraged to enjoy swimming, fishing, boating and paddling in designated areas.