Sorting salmon in holding ponds. Immature or "green" fish are left in ponds
until mature, usually about a week later. Preparatory to removing eggs for
artificial propagation at the Big White Salmon Hatchery.
Image ID: fish5910, NOAA's Historic Fisheries Collection Location: Washington, Big White Salmon Hatchery Photo Date: 1947 Photographer: W. E. Kubichek Credit: NOAA Central Library Historical Fisheries Collection