That's basically what Canada did with the Grand Banks in 1992. They didn't ban fish imports, but they did deploy the navy to prevent other countries (eg, Spain)

That's basically what Canada did with the Grand Banks in 1992. They didn't ban fish imports, but they did deploy the navy to prevent other countries (eg, Spain) from continuing to fish there. This absolutely devastated Newfoundland's economy, and even with unemployment insurance, the population dropped because people left to find work. I don't think a few years would cut it, the Grand Banks are juuuust starting to come back after almost 30 years of nearly no fishing.