Article body copy Aquaculture is big business in Canada. In 2023, open-net-pen salmon farming in British Columbia alone produced 50,000 tonnes of fish worth just over US $350-million. But on June 30, 2029, the federal government’s long-looming ban on open-net-pen salmon farming is set to take effect. On that day, 63 operations will be forced to shut down. For decades, BC’s open-net-pen salmon farmers have faced criticism that their activities are harming the environment by promoting the spread..