Most merciful way to kill your catch?

i always cut it through the spine. catfish always got the knife through the head. cutting the fishes head off doesnt make it any harder to gut or clean.

So the head off thing would only make it harder to clean would be the catfish so you can "nail it to a board and skin it". Bleeding out only would work if they're still alive - so it would seem that the key would be a good bonk to render them unconscious, but not kill them so they can still be pumping blood. How to bonk to knock out and not kill? Seems it would be too difficult to know that fine line... It looks like cutting gills to bleed out while in the live well without the PITH would be better eating meat... Cutting heads off "kills" (scuze' the pun) the ability to bleed out, so I don't see the advantage in it.
 
for bigger fish and catfish we use a wire in the head like a lobotomy or that frog in old biology class push it in between the eyes until you hit the brain and twist it around and around fish is dead but still breathing ,now bleed or what ever
smaller ones we dehead or fillet after a PITH lol never heard it called that but it fits
 
I stick my thumb into the fishes mouth, bend its head back and snap its neck right behind the skull. But then I only fish for Trout. I wouldn't suggest my technique with Pike or Bluefish!
 
i sever the spine right behind the head with a sharp filet knife. i also bleed out the larger fish. it hurts them im sure, but it's a quick death. best method is to take the head off as quickly as possible (as mentioned above).
 
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