The body of water known for its rich biodiversity and coral reefs is the Great Barrier Reef, located off the coast of Australia. This UNESCO World Heritage site is the largest coral reef system in the world, providing habitat to a vast array of marine life, including fish, mollusks, and sea turtles. It is a critical ecosystem that supports tourism and fishing industries. The reef faces significant threats from climate change, pollution, and overfishing, prompting extensive conservation efforts to protect its unique biodiversity.