The world’s largest coral reef system is the Great Barrier Reef, located off the coast of Queensland, Australia. Spanning over 2,300 kilometers (1,430 miles), it consists of approximately 2,900 individual reefs and 900 islands. The Great Barrier Reef is home to an incredible diversity of marine life, including over 1,500 species of fish, various corals, mollusks, and sea turtles. This UNESCO World Heritage site plays a crucial role in marine ecosystems and supports tourism, recreation, and research. However, it faces significant threats from climate change, pollution, and overfishing, necessitating ongoing conservation efforts to protect its fragile ecosystems.