A fisheries biologist at Leavenworth National Fish Hatchery in Washington displays a mature spring Chinook salmon which has migrated upstream to spawn. The Service operates 12 National Fish Hatcheries in Washington which raise several species of...
After being removed from a Hatchery raceway where they have spent the past few months, Tule Fall Chinook salmon pre-smolts swim down this channel, out the Hatchery intake pipe their parents entered six months ago, and enter the Columbia River.