Perhaps it could be a command, perhaps an item buyable in bait shops, but many fishermen & women would benefit from having a list of fishes according to their weight category spans (Very Small/Small/Medium/Large/etc.) Would help a bunch when hunting for the Catch of the Day, for example... It would mostly be a quality-of-life update, as the categories for individually caught fish are already listed on the list of caught fish, but it would still be nice.