A little research has told me (hopefully factually) that wild steelhead (called "trout" or "salmon" depending on the market) is of the same genus as pacific sockeye, (which also includes rainbow trout), but is an ocean-going fish that can return upstream to fresh water and spawn many times in their lifetime, as opposed to once for salmon. Different species, different habits, growth patterns, and fatty content; therefore different flavor profile and cooking required (steelhead is apparently quite lean). All very interesting, I need to see if the steelhead I see sold next to farm-raised atlantic salmon (which I dislike) is farm-raised or wild.