China, with one-fifth of the world's population, accounts for two-thirds of the world's reported aquaculture production. Aquaculture is the farming of fish and other aquatic life in enclosures, such as ponds, lakes and tanks, or cages in rivers and coastal waters. China's 2005 reported harvest was 32.4 million tonnes, more than 10 times that of the second-ranked nation, India, which reported 2.8 million tonnes. The principal aquaculture-producing regions are close to urban markets in the middle and lower Yangtze valley and the Zhu Jiang delta.