The Great Barrier Reef, a UNESCO World Heritage site in Australia, recognized in 1981, is the world’s largest coral reef system, stretching over 2,300 kilometers with more than 2,900 reefs and 900 islands. Home to vibrant marine life, including over 1,500 fish species and threatened species like dugongs, it reflects an unparalleled natural ecosystem. This site showcases Australia’s biodiversity heritage, offering a global marvel of ecological richness under increasing environmental pressure.