Not my favorite topic but it did catch my eye and I read through the comments....some fish, mostly trout, when caught and handled, can more readily, loose the protective slime that keeps them alive. Those I tend to keep, although rarely caught.
When asked to help produce a fish fry(generally annually) I tend to aim for Largemouth bass within the 12.5" to 15" range. These are keepers but not breeders who will not be missed in the reproductive cycle. Fileted and egged and breaded before frying makes them well worth the effort.
Keep in mind that if you don't harvest an occasional fish then PITA may be right when they say we are just harrassing the fish.