It's good that this has brought the issue to consciousness.  There are many reasons Atlantic Net-Pen salmon are not good in areas that have a significant wild pacific salmon population.  Anyone with any interest in this needs to see a DVD movie called "The Breach" about the challenges wild salmon faced in Alaska before that State BANNED SALMON NET-PEN FARMS.  I have a copy I would be happy to loan any group that would like to show it and it is available elsewhere.  These net-pen farms pollute the water and make wild salmon sick, despite whatever Cooke says.