Dossier
coral reef blue hole
Coverage of coral reef blue hole in the Nexus archive.
- China discovers rare coral reef blue hole in disputed Scarborough Shoal
China has identified a rare coral reef blue hole within Scarborough Shoal, a disputed feature in the South China Sea. The blue hole is a deep, circular sinkhole with bright turquoise or emerald green coloring, distinct from most land-origin blue holes.