I'm sure this is known to most, but have not seen it mentioned, did a search before posting, but for clarity and I hope helpful to some... When stacking fish, it does not matter what type. Just the graphic (a captain snook and a mahi-mahi are the same: direction and all) drop a Captain snook on a stack of mahi-mahi in your hold and it will stack itself in the proper Captain snook stack automatically (if also in your hold). I use this by placing duplicate graphic fish in a big pile, so I can get to at least a recognizable piece of any one of the fish. Ofcourse my hold is still a big mess and I should bag them all... but just so everyone knows.