STEP 4: Turn your knife flat and parallel to the backbone. Saw along the backbone (You’ll hear rib-bones and “Y” bones being cut through) to the tail, removing the complete slab of fish meat (?) which is one fillet. Do this to each side of fish.
STEP 6: Locate the row of rib bones on the fillet by feeling them with your finger. Then, place your knife edge right behind them and slice underneath. Remember to turn your knife blade up against the underside of the ribs immediately as you are making long, steady slices down the row of rib bones. The idea here is to remove the ribs without wasting meat.
STEP 6a: After slicing about half to three quarters of the way under the ribs, hold the fillet down with your knife point, grasp the ribs and tear them out. This move greatly speeds up the process and helps if you have a lot of fish to fillet.
STEP 7: Grasp the tail of the fillet with pliers and cut into flesh with blade while turning blade almost flat and sawing. Simultaneously pull with the pliers and push with the knife with a sawing motion. It helps to waggle your plier hand from side to side as your knife hand saws down the skin of the fillet.
STEP 7a: Continue down the fillet. The feeling in the knife is one of slight tearing as it cuts. Too sharp of your blade angle and you slice through the hide. Too flat of a blade angle and you will leave meat on the hide. Your knife must be quite sharp and you’ll need to develop a feel.