If you want clear cut information with credible sources about fish farm industry, check out the website Farmed and Dangerous organized for the Coastal Alliance for Aquaculture Reform (CAAR). The Living Oceans Society, The David Suzuki Foundation, The Georgia Strait Alliance and the T.Buck Suzuki Foundation are all part of this coallition.
There is always some players in any industry who take responsibility towards improving the industry they are a part of. A variety of companies have moved or developed their fish farming programs into on land tanks. The Broughton Archipelago Monitoring Program (BAMP) involves 3 major fish farming companies, CAAR and researchers working collaboratively to study history of area in regards to sea lice factors/transmission to wild stocks.
Another positive I have seen is the difference between farmed shellfish standards/practices from those of the fish farm industry. For a great example, check out the website for Sawmill Bay Shellfish Co. which does visit the Vancouver Farmers Market at times.