Comparative study of cadmium levels of shellfish and finfish species

This study indicates that the concentration of cadmium in shellfish species may often be higher than it is in their environment as a result of formation of stable biological chelate complexes. This study also indicates that the concentration of cadmium in finfish species is less than the shellfish species. It was found that cadmium levels in shellfish were relatively higher in oysters and shrimps, moderately high in scallops and squids, and less in crabs and clams. It seems that cadmium levels are surprisingly elevated in shellfish than other saltwater finfish. It also seems that larger shellfish had higher Cd content levels than the smaller shellfish of the same species.