Why all the fuss? What makes this fish world famous? Copper River Sockeye Salmon is caught in the waters of the Copper River Delta near the town of Cordova, Alaska. The river is a long river, forcing the Copper River Salmon to store large amounts of fat in order survive their long journey to the spawning grounds. It is this fat that gives the fish its rich flavour and it is the fat that is high in omega-3 oils making Copper River Sockeye Salmon a healthy addition to any diet.