John Pennekamp Coral Reef State Park is the first underwater park in the United States. It is located in Key Largo, Florida and encompasses approximately 70 nautical square miles of coral reefs, seagrass beds, and mangrove forests. The park is home to a variety of marine life, including fish, turtles, manatees, and dolphins. Visitors can enjoy snorkeling, scuba diving, fishing, kayaking, canoeing, and hiking in the park. The park is home to a variety of marine life, including: Fish: More than 600 species of fish have been documented in the park, including angelfish, butterflyfish, parrotfish, and snapper. Turtles: Green sea turtles, loggerhead sea turtles, and hawksbill sea turtles are all common in the park. Manatees: Manatees are often seen in the park’s warm waters. Dolphins: Dolphins are frequently spotted in the park’s waters.