In a small bowl, mix together the sugar, salt, and orange zest.
On a foil or plastic lined sheet pan, place the side of sockeye skin side down.
Sprinkle the sockeye with the curing mixture to completely cover.
Cover tightly with plastic wrap and refrigerate 4-6 hours depending on the size of the fish.
Remove the sockeye and rinse off the curing mixture, and pat dry.
Rest the sockeye on a cooling rack over a sheet pan to allow maximum airflow, refrigerate uncovered for several hours or overnight until a beautiful pellicle* is formed.