From fillet to remove with forceps a small longitudinal pits. The ribs also may be cut with a very sharp knife. Drizzle the fillet with a little brandy. This will not only give a special flavor Shine fish fillets, but also will kill germs. Sprinkle well with salt, add a little sugar (I don't do the proportion of 3 to 1). Salt does not save money, fish more than it is necessary, salt will not take. Put the fish on a white paper towel folded in several layers skin side up. Cover also and close it with cling film capacity with fish. Leave in the refrigerator for 4-6 hours (preferably overnight). Then rinse, dry with paper towels. With a sharp knife remove the skin. Serve, garnished with parsley.