We've long known that the fish we eat are exposed to toxic chemicals in the rivers, bays and oceans they inhabit.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/plastic-ocean-contaminating-your-seafood
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/environment-news-network
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/plastics
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/food-contamination
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fish
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mercury
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-disposal
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us