China discovers rare coral reef blue hole in disputed Scarborough Shoal (opens original article in a new tab)

China discovered a rare coral reef blue hole in the disputed Scarborough Shoal, which was formed by coral growth rather than ancient land caves, offering insights into the area's geological and environmental history.

• China identified a rare coral reef blue hole in the Scarborough Shoal
• The blue hole was formed by coral reef growth rather than ancient land caves
• The discovery highlights marine biodiversity and geological history of the area