You can't possess an illegal fish on a body of water. If I went to Truman and caught 15, 9-inch crappie and decided to stop by Stockton and get 15, 10" crappie, I could not have the 9" fish in my boat on Stockton. It's legal to get half a statewide daily limit from two water bodies, but you can't have a fish in your boat that would be illegal on the body of water you are on.