If you do not have scissors you can just rip the whole gill plate out with your hand. this method is very effective and works best with gloves. Can be a little messy, but the fish bleeds out quick.If you watch the end of my video in fishing videos under codis chromer you can see me do this and how fast the fish starts bleeding everywhere. If you do it without gloves you will probably scratch your hands up pretty good(I speak from experience). I prefer to cut them with a nice pair of long bladed scissors.