i didn't know that pick. some of those food studies are ridiculous, one study says its good for you, another says bad, ect. sea food is my fav, been chowing down on the sea peeps forever now with no complication.
nope, these are like pools/ponds with filter systems and they only have tilapia, you can even go and hand fish them and they'll clean and fry them for you at the farm, good stuff.