Commercial fishing is big business in Alaska. People known as commercial fishermen catch fish to earn a living. In Cook Inlet there are five species of salmon. There are chinook (king), sockeye (red), coho (silver), chum (dog) and pink(humpy). These species are caught by commercial, subsistence and sport fishermen. Fish stocks return to spawn in the Kenai and other rivers of Cook Inlet. Depending on the species, these parent fish will return after two to five years to the stream where they were hatched. Pink salmon return to the stream where they were hatched every two years. King salmon, the largest of the five species, return from two to five years. The species that return in greatest numbers are the sockeye (red) salmon. These salmon bring the most money to the set net industry.