HSL my belief that most people fishing for trout are actually catching steelhead or salmon smolts. I never target trout/smolt expect on the fly pole when the water is low and steelheading is tough. The death rate is very low with this techique. I'm not a fish biologist but I tell the difference between a salmon,steelhead, and resident trout smolt by there appearance. Most of the fish I catch with the fly are steelhead smolts over resident trout. I usually fish the upper green. I believe that the lower green has more resident trout. I don't have the regs in front of me but think "trout" must be 12 or 14 inches. It is kinda scary to think how many steelhead smolts are probably being killed a find legal "trout". I wish that they would prohibit using bait on the green to help the fishery. Probably pissed some people off oh well just my $.02