World’s deepest underwater sinkhole discovered in South China Sea

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By Alexander Maveal, Global News, July 28, 2016 

Locals call the Longdong blue hole the “eye” of the South China Sea

Researchers in China have declared a blue hole off the Paracel Islands in the South China Sea to be the world’s deepest.

Sansha Ship Course Research Institute for Coral Protection researchers used an underwater robot and depth transducer to determine the depth of the underwater sinkhole hole, named “Dragon Hole.” Its depth? About 300 metres.

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