I have to add that we DO eat seafood and we are not about to stop--in fact I wish we ate more. We do our best to avoid items that are considered environmentally unfriendly from both the 'compromised fishery' standpoint like chilean sea bass and from the 'toxic TO the environment' category like farmed/gmo salmon.
My husband is an avid fisherman, and we primarily eat fresh fish and a few clams that he catches himself, from what we consider to be 'safe' waters (places I'd feel comfortable swimming), like bluefish, striped bass and fluke. Some of those may be risky due to the places that the fish spawn and spend part of their lives, but I still consider it safer than any piece of meat whose origin I know nothing about...
As with anything, you need to weigh the risks and benefits and decide what is best for you and your family
.