Great Barrier Reef (Australia)

The Great Barrier Reef, located off the coast of Australia, is the world's largest coral reef system, spanning over 2,300 kilometers. It comprises thousands of individual reefs and islands, supporting a rich diversity of marine life, including fish, sharks, sea turtles, and corals. The reef is vital for ecological health, tourism, and local economies. It forms through the buildup of coral skeletons over thousands of years, thriving in warm, clear tropical waters. However, it faces threats from climate change, pollution, and overfishing, making conservation efforts essential to protect this world-renowned natural wonder.