Steelhead is a species, it contains a genetic code... no matter where you hatch it or rear it or plant it, in any enviroment a steelhead of steelhead orgin is a steelhead, now.. that fish is within 1 generation going to begin an evolutionary change through each generation to the best suited creature for its new enviroment. If you take 20 kids from new york and transplant them in yelm they are going to be new yorkers even though they live in yelm now, however each time they mate the off-spring will become northwesterners, and each ensuing generation will become even purer northwesterners slowly losing their new york heritage... but their children will claim new yorker status as long as its cooler or more impressive than being a northwesterner... steelhead after 1 generation in a lake run enviroment are trout... no matter how much cooler it is to call them steelhead. A trout in a river that is over around 22'' is considered a steelhead becouse of how hard it is to stick a hook in a trouts face of that caliber... so, split hairs, moot point, a big ass trout is a big ass trout and lets let them share the cool name with us.... for their trout-