I believe that the additional concerns of purchasing products from other countries involve the ideas of "outsourcing" and environmental issues, as well as quality and taste. Farm-raised finfish and shellfish not only take away from our own local folks trying to eke out a living, (I can relate to this as I used to own a shrimp boat), foreign aquaculture is notorious for experiencing massive failures which in turn lead to environmental contamination of natural resources in incredible proportions. Cyclical failure of Japanese aquaculture and Asian Carp invasion, for example. A full-court push issue here, and which has been, is to buy local, wild-caught seafood. Salmon, shrimp, et.al. Mainly shrimp here. I just saw, in a new catalog of mine, my local seafood house, (about four blocks from my home), selling 5lbs. of our local, wild-caught shrimp for $95.00. Well that's great for my friends here, but I can walk down there and get the same shrimp, not frozen and fresh off the boat, for $6.00 per pound, (or less depending on the season because these are 31-40 count). Buying foreign, farm-raised products is tantamount to MNC's; calling for IT support and getting hooked-up speaking with someone who's in India; etc. Just yesterday, for instance, this story ran in my local newspapers, (I had to wonder if, [tongue firmly in cheek here], this could be attributed to the price of our local product in that well-known catalog): http://www.beaufortgazette.com/state_news/regional/story/6613722p-5891056c.html
Farming does, I suppose, relieve our resources from over fishing and it does give the restaurants uniformity of size-per-serving, etc., but at what cost? I do know, for a fact, that a lot of the seafood restaurants on the coasts use farm-raised over true simply for portion control and uniformity. For example, they easily can order the shrimp for the platter from a supplier that has them all per-portion pre-packaged and uniform in size, etc., that they can open, cook and the consumer loves them. True, fresh-off-the-boat seafood is graded for size, yes, however, they are not all born and raised at the same time in the same environment producing a uniform product on the plate. This is what consumers want so that's what they get. It seems to all be a matter of priority and how far one will go to support ideals.