I love fish, especially the full flavored fish like speckled and rainbow trout. However, eat it sparingly. We have contaminated the waters with mercury from coal fired electrical plants. Such great bodies of water such as Lake Superior, The Au Sable river, the St. Mary's River, Lake Michigan, etc. have increasing levels of methyl mercury, rendering the fish dangerous to the infirm very young children, pregnant women, etc.
Mercury attacks the nervous system, as does lead, cadmium, arsenic, and the other "heavy metals" from the element chart. In years long since past, loco weed decimated cattle herds. It took a long time before anyone realized that loco weed was simply mormally edible plants that had grow in areas rich in heavy metal deposits.
The phrase - mad as a hatter - comes from the 17th centruy practice of stiffening the brims of felt hats with mercury. The hatters absorbed the toxic metal through there skin and slowly went mad, litteraly.
I hate to say this, but I need to. There are many beneficial nutrients in fish oil that could benefit us, leading some consumers to eat large quantities of fish. Unfortunately, those same consumers have reported numerous cases of mental change, hair loss, and failing health that was linked to heavy metal poisoning. I have a good freind who is a bioligist with our tribe. He keeps me well informed. Do the research. And push your politicians to develop renewable energy means where possible, such as wave action, wind, solar, and water power. We have only this one planet on which to live. I'm tired of seeing it's natural beauty and great bounty wasted and destroyed.
Sorry for the sour grapes.
Seeeeeya; Goodweed of the North