I am "frayed" I agree with PrisonChef on this one! When there is a doubt chuck it. Especially, on seafood. Living here on the coast of SC I know many commericial fisherman. As a result I can purchase seafood as fresh as it gets. Lots of times I can trade "Q" for it. Hard to beat fresh caught grouper. Especially, for a Lb or two of "Q" I do not/will not buy fish,seafood in a grocery store. The following may be true for meat as well. From the feed lot to the table, I dunno...
For those less fortunate not to live at the coast (just kidding) consider this. The fisherman is out for anywhere from 4-10 days trying to maximise his catch, to recover his cost. His catch is on board for maybe days, depending on when he caught it,(day 1) then it goes to the fish house to be processed, (couple days) then to the grocery wearhouse or to the wholesale company they buy from (couple days) then to the coolers in the store or restaraunt. During all of these steps if the product is not handled carefully or correctly it can lead to serious problems. Remember the fish was caught two weeks ago!
I am sure some here have been witness to, as I have, the BLEACH WASH, LEMON JUICE WASH..on product that is suspect in order to prevent chucking the money spent.
I watched my neighbor reheat oysters several years ago and got so sick he turned colors (not stretching the truth one bit)...he won't/can't to this day be around an oyster roast! AND THAT is a terrible thing.
So if the consumer is not careful it can lead to bad side effects.
It is easy to take steps to prevent this. Just when in doubt....