The region containing the world's largest coral reef system is the Great Barrier Reef area, located off the coast of Australia. This reef system is the largest of its kind globally and is recognized for its extensive biodiversity, hosting thousands of species of marine life, including fish, corals, and mollusks. As a UNESCO World Heritage Site, it faces environmental threats, prompting conservation efforts to protect its fragile ecosystems. The Great Barrier Reef is also a major tourist attraction, offering activities like snorkeling and diving, making it crucial for both ecology and economy.