like ghost said, they can be in the same livewell...just be able to identify who caught what....you can have 5 different people throwing fish in the same cooler...just put an identifier on the fish each person caught...clipping fins works great..one person doesn't clip, one clips tail, one clips dorsal, one clips pectoral...etc. etc...once you start doing it..it really becomes second nature and doesn't take hardly any time at all. the reason for the rule is because "party" fishing is illegal in MO, this rule is so the agent who checks you doesn't have to guess who caught what when there are 42 crappie in the cooler. Its your responsibility to be able to show the agent