As local fishermen tell it, the deep blue “Dragon Hole” in the Xisha Islands, called the “eye” of the South China Sea, is where the Monkey King in Journey to the West acquired his famous golden cudgel. After nearly a year of exploration, Chinese researchers have determined that the underwater sinkhole is likely the world’s deepest, reaching about 987 feet below the surface and surpassing the previous record holder, Dean’s Blue Hole near the Bahamas, by more than 300 feet, Xinhua News Agency reported. Blue holes are named as such for their rich, dark blue coloring, a stark contrast to the otherwise aqua waters that surround them. Researchers with the Sansha Ship Course Research Institute for Coral Protection began exploring Dragon Hole, known as Longdong, in August 2015 and completed the project last month, Xinhua reported. …
Blue holes are named as such for their rich, dark blue coloring, a stark contrast to the otherwise aqua waters that surround them. Best described as underwater caves, these striking and beautiful formations open up with underwater entrances and extend below sea level, mirroring the appearance of a sinkhole.
Researchers with the Sansha Ship Course Research Institute for Coral Protection began exploring Dragon Hole, known as Longdong, in August 2015 and completed the project last month, Xinhua reported. It measures about 426 feet wide and is almost deep enough to hold the entire Eiffel Tower.
The research team used a Video Ray Pro 4 underwater robot to explore the sinkhole, reported CCTV News, where they discovered more than 20 species of fish and marine life near the surface of the vertical cave. Researchers told the television station that after about 330 feet, the water is oxygen free and likely unable to support life.
On July 24, CCTV reported that the Sansha city government had officially named the sinkhole the Sansha Yongle Blue Hole.
The city said it has drafted plans to continue to protect and study the blue hole.
“We will strive to protect the natural legacy left by the Earth,” Xu Zhifei, vice mayor of Sansha City, told Xinhua.
Across the globe, blue holes have been the source of magnificent discovery. Last year, the Guardian reported that a study conducted by scientists from Rice University and Louisiana State University found that sediment samples from the ancient Great Blue Hole in Belize confirmed the theory that “drought and climate conditions pushed the Mayans from a regional power to a smattering of rival survivors and finally a virtually lost civilization.”
Divers flock to the Great Blue Hole, surrounded by shallow, lagoon waters and a coral island. According to Atlas Obscura, this underwater cave was made famous by one particular diver, explorer Jacques Cousteau, who in 1971 declared the site one of the top ten best places for diving in the world. Cousteau sailed on his ship, Calypso, to investigate the hole’s depths and discovered huge stalactites and stalagmites below the surface, Atlas Obscura reported. Cousteau also confirmed that the sinkhole had formed when a limestone cave formation collapsed after the glacial period.