In order to have large populations of anadromous fish we must make significant changes in how the ocean is managed. If you want an upper-level predator you have to provide the food base. I seriously doubt that we, as a society, are willing to throw shellfish, forage fish, salmon, rockfish, tuna, pinnipeds, whales, cormorants, terns, and who knows what else into the pot and make public decisions on each species.

When and if we do that we can then move to the habitat.