The Chinook is blue-green,red or purple on the back and top of the head with silvery sides and white ventral surfaces. It has black spots on its tail and the upper half of its body. Its mouth is often dark purple to black. Adult fish range in size from 24 to 36 in (610 to 910 mm) but may be up to 58 inches (1,500 mm) in length; they average 10 to 50 pounds (4.5 to 23 kg), but may reach 130 pounds (59 kg). The current sport-caught world record, 97.25 pounds (44.11 kg), was caught on May 17, 1985 in the Kenai River (Kenai Peninsula, Alaska). Some were found dead at well over 100 lb. The commercial catch world record is 126 pounds (57 kg) caught near Rivers Inlet British Columbia in the late 1970s.