I recently read an interesting article¬†at the organic consumers association website. The crazy thing is that farmed carnivorous fish are fed wild fish and it takes almost 2 times as much feed for every fish raised. (1.9 to 1). So farmed fish is placing a strain on existing fish populations.
Fish and fish oil are extremely healthy, but it is important to look for wild caught fish and fish that is free of heavy metals. Some good examples are Pacific caught salmon which is high in omega-3 fatty acids and typically has less pollution than the atlantic variety. Also, sardines are an excellent source of omega-3’s (more than salmon) and because they are smaller fish they contain much less mercury than bigger fish like tuna and salmon.