The following excerpt is from an article that originally appeared on Natural Society
Scientists from Scripps Oceanography say in a new report that tuna caught in industrialized areas of the Pacific and Atlantic oceans contains 36 times more pollutants than tuna caught in remote parts of the West Pacific. 
For the study, published in June 2017 in the journal Environmental Health Perspectives, researchers looked at toxin levels in tuna caught around the world and found that the source of the fish can affect how safe it is to eat, as much if not more so than its species.
Lead author Sascha Nicklisch, a postdoctoral researcher at Scripps Institution of Oceanography at UC San Diego, said:
“The pollutant levels in seafood — and tuna in our case — can be heavily determined by the location where it was caught. It is important to know the origin of catch of the fish, to know the amount of pollutants in your fish.”
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