Blood cockles in Sungai Buloh Selangor need attention: “If pollution is detected from these samples, then the authorities have to come in. Elements such as arsenic, lead, cadmium, copper and zinc have to be looked into due to their toxicity, to see if they are within permissible limits or at elevated levels. Anthropogenic activities have to be taken into account, too, as they will contribute to the accumulation of hazardous chemicals in the environment. Government departments, Fisherman associations and other relevant association should engage experts to help them.

http://www.thestar.com.my/News/Environment/2014/08/11/Our-blood-cockles-are-dying-Can-we-stop-the-killing/