The blue glow from bioluminescent plankton light up the Xiaoheishi sea area off the coast of China’s Dalian, Northeast China's Liaoning province in May, 2017. (Photo/CFP)
The blue glow from bioluminescent plankton light up the Xiaoheishi sea area off the coast of China’s Dalian, Northeast China's Liaoning province in May, 2017. (Photo/CFP)