Dead fish are seen in a pond at a fish cultivation base in Gutian county, Fujian Province, Sept. 3, 2011. A large amount of cultivated fishes were found dead with unkown reasons in recent days in the Minjiang River's Shuikou Township section, which is the largest aquaculture base in Fujian. The floating dead fishes, decaying in hot weather, have been polluting the river, the main drinking water resource of the province. The cause is still under investigation. [Photo/Xinhua]