My adaptation gives me a steelhead.

The only "Steelhead" I am aware of is the Steelhead trout (Oncorhynchus mykiss). It is also called the Rainbow trout. They are a great sportfish and good eating.

Salmon

Steelhead Trout is is a type of rainbow trout which is predominantly found along the Pacific Coast of the United States. Throughout the world Steelhead Trout are found within the Western Pacific south and throughout the Kamchatka peninsula. These types of fish are labeled as endangered and threatened.

The answer is yes. There is Landlocked Steelhead Trout Fisheries around. Many states have lakes filled with steelhead trouts.

No, not in any measurable number.