Jellyfish swim in a basin of the Haus Des Meeres building in Vienna, Austria on June 9, 2015. Haus Des Meeres, built during the World War II as one of the four Vienna’s anti aircraft gun and battle towers, hosts an Aqua-Terra Zoo where visitors also can get a view of the city from the 9th floor open air terrace. (Photo by Joe Klamar/AFP Photo)
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