King Salmon may spend between 1 to 5 years in the ocean before returning to their native streams to spawn, though the average is 3 to 4 years. The King Salmon is blue-green on the back and top of the head with silvery sides and white bellies, black spots on the upper half of its body with gray/black mouth coloration. King Salmon  reach up to 60 inches in length and weigh up to 70 pounds, although King Salmon is generally up to 36 inches in length and weigh up to 30 pounds.