Is there a good way to murder a catfish?

I have taken up the art of murdering catfish. I eat them so don't be mad. Eddie goes fishing all the time and he throws the fish back. This seemed like a terrible waste of food to me and when I told him so he started to give them to me. (fish is good for you, you know) The down side is that he makes me clean them as well.

It seems to me that the catfish take an extra long time to die. All the men I have talked to around here act like it shouldn't bother me but it does.

So, my question is...Is there a quick way to kill a catfish?