An argument can be made for both sides of this issue, just like the three rod rule. Personally, as long as the total number 5 doesn't change, what takes away from one species will add to another. Another point would be fuel savings. A sportsman will be a sportsman. We all have to have a conservative view when it comes to any of our game fish. Limits are just that. If everyone onboard catches 3 Kings, I'm a happy camper. Many tournaments give bonus points for Lakers, Steelhead, and Browns. When a sluggish Laker counts more than a feisty King, I think it dishonors this worthy species. One thing the 5 fish rule will do, is allow you to keep dead shakers, and even some bigger Kings that would otherwise have to be farmed, and end up as Seagull food. If I spend the morning on the pond, and have 3 Kings per person, I'm NOT going to try very hard to fill up. JMHO