Im trying to fillet with the skin on. Ive been halfway successful . I often cut through the skin. Im trying it like this guy. [youtube]ZVwZgA3ktn4[/youtube]
With catfish I was always taught to take a board with a nail through it. Impale the head on the nail take your filet knife and cut around the collar and the dorsal spine. Tale pliers and peal the skin off like you are taking a sock off.