seaweed

A swimmer walks on a beach covered in seaweed in the coastal city of Qingdao, eastern China's Shandong province, 17 June 2013. The seaweed, named enteromorpha prolifera grow quickly due to marine water eutrophication and warm weather following the ocean current that gather at the coastlines of Qingdao and the neighboring cities in recent days. This causes oxygen deficiency for the marine aquaculture and bad effects for the tourism.

Wu Hong/EPA

A swimmer walks on a beach covered in seaweed in the coastal city of Qingdao, Shandong province in eastern China.