I would be inclined to say "no" inside Puget Sound like you said due to toxin concerns.

That being said, if you lightly batter the head and deep fry it the entire thing is edible, and quite good. Legs, horn, and all.
_________________________
When I grow up I want to be,
One of the harvesters of the sea.
I think before my days are done,
I want to be a fisherman.