I thought I was confused on the "source" article of salmon and trout studies on catch and release created over in the UK somewhere's. I'm really confused now, if you hook a crappie in the mouth and don't tear his jaws to shreds then yes you can release the said fish and it will be alright. If you gill hook one and rip a gill then chances are pretty dim. Crappie don't like live-wells, but they survive in mine just fine in the right conditions. Don't hold them captive and interrogate them before turning them lose, just catch them and toss em' back. As far as large mouth, don't really have an opinion, I won't eat one less it's under 2 pounds or so.. bout it