QINGDAO, CHINA - JULY 20: (CHINA OUT) <br />
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Seaweed Swamps Qingdao Coastline<br />
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Tourists play at a beach covered by a thick layer of green algae on July 20, 2015 in Qingdao, Shandong Province of China. A large quantity of non-poisonous green seaweed, enteromorpha prolifera, hit the Qingdao coast in June and July this year.<br />
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