Both Dolly Varden and bull trout inhabitat Puget Sound and coastal rivers. Most fish biologists couldn't tell them apart, so you cannot tell which fish is listed as threatened under the ESA and which is not. They are wild, and just like native steelhead, they are not especially abundant. The fairly good fishing for them on the Skagit is due to the 20" size limit and the fact that anglers are releasing them instead of killing them all, as they used to.

If you don't need it, and if you can afford to go sport fishing - you don't need it, let it go. Keep hatchery fish to eat, and maybe wild salmon from the more abundant populations.

Sincerely,

Salmo g.