We fish farm and release hundreds times more fish every year and release them to the oceans hoping they will come back and spawn. 30 million or more from just the Gulkana hatchery. But Oh no disease threat there.  So if these salmon can move into Alaska and survive and reproduce, then more power to them. If they can, it was probably only a matter of time any ways. Alaska con not dictate policy on fish farming to the rest of the world. And the rest of the world thinks it is OK. So Alaska can get on board and be the biggest and best or be left behind. Which is where we are now. Eventually the commercial fishing permits for the open ocean will be as valuable as the West Virginia coal fields.