Tom, the designation, "troll caught fish" means fish harvested by trolling hooks attatched to lines. (They're brough in by hand, mostly)
To my knowlege, the is no WA SW commercial troll fishery for steelhead, just salmon.
These commercials get a higher price for the troll-caught salmon from the fish-buyers than net-caught fish, and of course are more expensive for consumers at the market.

As salmo g mentioned, there are two kinds of steelhead/salmon, comercially speaking. Wild (free swiming), and farm-raised (in a net pen).


J.D.