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Montreal urban fish farmers say their Arctic char cuts greenhouse gases and waste | Winnipeg Free Press
(www.winnipegfreepress.com)
I see no mention of what their fish are eating. One issue with farming carnivorous fish is that they need fish to eat and often that comes from fish pellets which are generally small fish caught in the ocean. So fish farming such as this ends up not really farming at all, but rather turning wild fish into farmed fish.