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![Chinook salmon (Onchorhynchus tshawytscha) fizh1180.jpg Chinook salmon (Onchorhynchus tshawytscha)](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_fizh1180.jpg?itok=VGzZsMLk)
Description
Chinook salmon (Onchorhynchus tshawytscha) . The chinook salmon spendsmost of its life in the ocean, but comes into fresh waters to spawn and die.While there is a run every year, the life span of each generation is about fouryears. Although the average weight is much less, these fish may attain a weight of over 50 pounds. Specimen from Columbia River. (Image credit: NOAA Central Library Historical Fisheries Collection | W. F. Kubichek)