YANTAI, July 9, 2016 (Xinhua) -- A tourist and his dog watch a sea area covered by green algae in Haiyang City, east China's Shandong Province, July 8, 2016. Green algae, or enteromorpha prolifera, struck the coast of Haiyang due to wind direction and tidal current. The clear-up work is underway. (Xinhua/Tang Ke)