Welcome to Biscayne Bay-Cape Florida to Monroe County Line Aquatic Preserve – Miami’s blue heart. Step away from the busy city and immerse yourself in all that nature has to offer. Dive in and meet some of Miami’s favorite locals: manatees, bottlenose dolphins, turtles and the lovely spiny lobster. Explore seagrass flats with Bahamian sea stars or dive on some of the preserve’s patch reefs.