Two sea lions play with a volleyball during a performance at an aquarium in Tokyo, Japan. [Xinhua]
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![Two sea lions play with a volleyball during a performance at an aquarium in Tokyo, Japan. [Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090110/000cf1a487730ad240600a.jpg "Two sea lions play with a volleyball during a performance at an aquarium in Tokyo, Japan. [Xinhua]")