mercury pollution

‘… Highest mercury and arsenic levels ever recorded in stranded dolphins and whales”

It’s much harder to track the effects of the tens of thousands of chemicals that are dumped in the ocean every day, through sewage, agricultural runoff, and industrial waste—most of which have unknown effects on wild ecosystems. What we do know is that the bodies of marine animals act like magnets for these toxics, which accumulate in their fat and are amplified up the food chain.

Elephant Seals Contaminated with Mercury

Researchers at Ano Nuevo found the mercury level in the water during the molting season 17 times higher than what it is at other times of the year. That led them to look at where the mercury was coming from: the seals themselves. The molted skin takes with it some of the mercury that the seals have accumulated from the prey they eat in the ocean. Their blood and muscles have higher concentrations of mercury than would damage the nervous system of a human.