I am not making this post to defend fish farms but I would like to point out that you tube is not recognized as a source of the best peer review science. It is good for promoting an agenda cloaked as science. Look at the link below, I have heard both of the scientists give presentations and their arguments are convincing. In one talk photos of steelhead smolts from Hood Canal, completely covered with sea lice were shown. Are there salmon farms in Hood Canal?

http://www.newsdata.com/fishletter/242/4story.html

Toxic compounds in farmed fish are a concern. One should read the paper, widely reported in the press a few years ago, and not just the stories in the press. Reported in the paper but not in the press was that tests indicated that chinook on the west coast had a higher level of dangerous toxins than any west coast farmed salmon.