They are caught in saltwater incidental to coho and chinook, but infrequently. I suppose if you targeted them with the same rig as we use for Lake Washington, you might catch some. I have a feeling, though, that when they are out in the ocean they are either dispersed, or far out on open waters. There is also the rationale of, why bother scraping for 4-5# sockeye when you can get gobs of 8-10# coho, and some 20-40# chinook? That's in Alaska at least.