Rare coral reef blue hole found in South China Sea
- Posted on June 25, 2026
- By The China Daily
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- 1 min read
Rare coral reef blue hole found in South China Sea
China's first coral reef blue hole — a large natural depression on the ocean floor — has been identified in the waters off Huangyan Island in the South China Sea, and it has emerged as a biodiversity hot spot, according to a report released on Thursday.
