1
Great Barrier Reef
- Area (km²)
- 344400
- Location
- Australia
Top 8Updated 2026年3月3日
Top 8 Largest Coral Reefs in the World
This ranking is based on total coral reef system area using data from marine research institutions. Coral reefs are vital to marine ecosystems, with size indicating biodiversity conservation value.
Top 3
- 1Great Barrier Reef
- 2New Caledonia Barrier Reef
Interesting Facts & Summary
The Great Barrier Reef holds the top spot not just as a landmark, but as a living wonder visible from space. Stretching over 2,300 kilometers with an area of approximately 344,000 square kilometers, it is larger than the entire United Kingdom or Italy. Its scale dwarfs the runner-up, the Red Sea Coral Reef (approx. 30,000 sq km), being more than 10 times its size. Despite the mounting challenges of ocean warming, the Great Barrier Reef remains the pinnacle of global biodiversity, hosting over 1,500 species of fish and 400 types of hard coral—a true 'rainforest of the sea'.
| Rank | Name | Area (km²) | Location |
|---|---|---|---|
| 1 | Great Barrier Reef | 344400 | Australia |
| 2 | New Caledonia Barrier Reef | 15000 | France (New Caledonia) |
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