An all tuna diet probably isn't the best thing for you if you are worried about mercury. If your goal is to eat more fish, try to buy smaller fish. Larger fish (like tuna) have more mercury because they eat lots of smaller fish and all of that mercury from the smaller fish accumulates inside of them.
This magnifies the level of mercury in larger fish exponentially. Anyway, eat the tuna while you still can, who knows how long it will be before edible fish are extinct.
I pulled this from the EPA's website: Elemental mercury effects Symptoms include these: tremors; emotional changes (e.g. , mood swings, irritability, nervousness, excessive shyness); insomnia; neuromuscular changes (such as weakness, muscle atrophy, twitching); headaches; disturbances in sensations; changes in nerve responses; performance deficits on tests of cognitive function. At higher exposures there may be kidney effects, respiratory failure and death. I also found an article on WebMD about eating fish in general, and specifically regarding mercury.
You may take a look at it: webmd.com/food-recipes/tc/avoiding-mercu....
Mental problems including paranoia, but most of the symptoms are long-term. Why are you going all tuna? It's a good idea to mix it up rather than rarify your diet unless you have to avoid a lot of things.
Symptoms of mercury poisioning in doggs include seizures, unusual behavior, vomiting, lethargy, uncoordinated movement. See your vet.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.