Saw an albino steelhead once when I was in college at UW Fisheries. Someone caught it in the Skykomish River and brought it to the school. Very unusual for an albino to survive to adult phase, since they are so easy for predators to spot.
Have seen a number of albino kokanee (land locked sockeye) fry in a hatchery but never an adult.
Since the sockeye in question does not have pink eyes it is not an albino.
The only wild adult albino salmonid I have seen was a resident cutthroat in a small step across stream in the Snoqualmie system.
Another interesting oddity is a robin egg blue colored rainbow. Have seen two of those in the wild; again in small streams. It maybe that in those small waters such fish are not exposed to as many predators and even though the "stick out" they are able to survive to become an adult.