How do you humanely euthanize a fish???

Originally Posted by Byron

I still say the quickest way is to net the fish out onto a piece of paper towelling folded over, fold the towel around the fish, and hit it with your hand. The fish is instantly dead, and I mean instantly, with absolutely no pain and the only stress is netting it out which is nothing beyond what would happen normally when you net it out.

All the other methods involve time, and what is the fish going through while it is being frozen, or "put to sleep?"