Different kinds of perch on the coast versus in the sound. Used to catch Rainbow Perch in Coos Bay, very tasty, but sorry I can't help you down in Nisqually. Wish I could find them up here as well.
Ive seen Starry Flounder come off the flats in Nisqually, I think they are open year round, but not positive. They are better tasting than halibut IMO.