The Great Blue Hole is a large submarine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km from the mainland and Belize City. The hole is circular in shape, over 300 m across and 124 m deep.
Magnificent blue glow of Hong Kong seas also disturbing
This Thursday, Jan. 2015 photo made with a long exposure shows the glow from a Noctiluca scintillans algal bloom along the seashore in Hong Kong. The plankton and Noctiluca become more abundant when nitrogen and phosphorous from farm run-off increase.
Hong Kong’s Sea Sparkle. The glow is an indicator of a harmful algal bloom created by something called Noctiluca scintillans, nicknamed Sea Sparkle. It is a single-celled organism that technically can.