A survey on the cadmium content of fresh water, marine fish bivalve mollusks and crustaceans in China was carried out by the National Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention in 2002. The fish from fresh water (n = 193), marine (n = 367), crustaceans (n = 318) and bivalve mollusks (n = 512) were collected from 14 provinces and cities and analyzed by AAS. It was found that the samples with mean concentration between 0.06-0.53 mg/kg. However, some of samples were up to 8 mg/kg, indicating that the cadmium content of some fishes exceeded the maximum level of national standards.