Workers help the arrived dolphins adapt the new environment in a breeding pool of the Ocean Aquarium of Penglai in Penglai City, east China's Shandong Province, May 15, 2013. Ten dolphins, arriving in Yantai of Shandong Province from Osaka of Japan on May 14, with an average age of 2 to 3 and an average weight of 200 to 700 kilograms, are about 3 meters in length and will see the public after 1 to 3 months of adaptation. (Xinhua/Chu Yang)