PETA cite a story of boy who suffered from eating too much tuna:
Tuna fish accumulate toxic mercury in their flesh as a result of industrial pollution, and the side effects of mercury poisoning include finger curling, cognitive impairment, and coordination problems. A California boy, who was the subject of a front-page Wall Street Journal article, went from being a star athlete and honor student to being unable to concentrate or catch a football because he ate canned tuna.
I could not find the WSJ article.
Have there been cases of people experiencing adverse health effects caused by high tuna consumption (as in mercury poisoning)? Is there any research on the subject?
What is the safe daily limit of mercury consumption? How does measured tuna mercury content compare to this limit?