What is the largest coral reef system in the world?

The largest coral reef system in the world is the Great Barrier Reef, located off the coast of Queensland, Australia. It stretches over 2,300 kilometres (1,430 miles) and consists of more than 2,900 individual reefs and 900 islands. The reef is home to an extraordinary diversity of marine life, including over 1,500 species of fish, 400 species of coral, and endangered species like dugongs and green sea turtles. It is a UNESCO World Heritage Site and an essential part of the marine ecosystem. Despite its beauty, the reef is under threat from climate change, coral bleaching, and pollution.