"The daily creel limit is the number of a particular sport fish species you may keep in one day's fishing. A possesion limit is two times the daily creel limit for all species with a daily creel limit and excludes processed fish." That is the how KDFWR defines the difference on their website. It sounds to me like the most you could have in your boat would be 40 if there are 2 or more people in the boat, if you are alone you could have only 20 in your boat. That's a very interesting question and if there is anybody out there that knows for certain please let us know.