The Chinook salmon (Oncorhynchus tshawytscha) is an anadromous fish that is the largest species in the salmon family. Chinook salmon range from San Francisco Bay in California to north of the Bering Strait in Alaska, and the waters of Canada and Russia.
They are highly valued, mostly due to their relative scarcity, compared to other salmon along the Pacific Coast.
Nine populations are listed under the U.S. Endangered Species Act as either threatened or endangered, including the fall runs found in California's Bay-Delta.
This image was originally posted to Flickr by USFWS Pacific Southwest Region at https://www.flickr.com/photos/54430347@N04/5456985064. It was reviewed on 00:17, 8 May 2011 (UTC) by FlickreviewR, who found it to be licensed under the terms of the cc-by-2.0, which is compatible with the Commons. It is, however, not the same license as given above, and it is unknown whether that license ever was valid.