I haven't eaten flounder since I was a youngun' and I always found them a little too boney for me. Much prefer fresh coho. And a very good question MKC about the toxicity levels in the fish. I would question whether it would be safe. Migrating fish are fine I'm sure but I may be wrong but I would think flounder's would pretty much live in one area for there whole existence, would'nt they ?
That being the case I would I would not avail myself the luxury of this fine cuisine even if it might make me stronger. Had a friend who smoked cig's and cigars like a chimney, drank like a fish and never excercised. I often warned him of his habits but he would shrug them off saying, "My grandpa lived to be 95 and he smoked and drank his whole life just like I do, hah."
Passed away at the ripe old age of 54. Nice catch of fish by the way Joshuag232, well done.