http://www.newsweek.com/dolphin-babies-toxic-chemicals-mother-milk-1841219

Baby dolphins are being fed toxins from a source you might least expect: the milk of their mothers.

The toxic pollutants, including polychlorinated biphenyls (PCBs), DDT and flame retardants, end up in the baby dolphins in higher concentrations than in their mothers, new research in the journal Science of The Total Environment has found.