Chinook Salmon
Oncorhynchus tshawytscha
Chinook Salmon (Oncorhynchus tshawytscha) is the largest Pacific salmon, anadromous and prized for its strong runs and table quality. It spawns in cool freshwater rivers and streams, then juveniles migrate to the ocean before returning to natal waters to reproduce.
Identification points
- Black mouth and gums with small black spots on the back and both lobes of the tail.
- Black spots on the lower tail fin rays, unlike most other Pacific salmon.
- Blue-green back with silvery sides in ocean phase; spawning fish often darken to olive, red, or bronze with a hooked jaw on males.
Habitat
Cool, oxygen-rich freshwater rivers and tributaries with gravel riffles for spawning; juveniles rear in stream margins, estuaries, and nearshore marine waters before ocean migration. Adults stage in deep pools, river mouths, and current seams during runs.
Bait notes
In saltwater or estuaries, herring, anchovy, sardine, and spoons are effective; in rivers, salmon eggs, cut bait, marabou jigs, and drifted cured roe work well. Fishery rules on bait and terminal tackle can be strict, especially during spawn.
Behavior
Adults are anadromous, strongly homing to natal systems; they often stage before entering rivers, then move upstream with flow and temperature cues. Feeds in ocean on fish and crustaceans; adults in fresh water usually stop feeding or strike out of aggression during runs.
Caution
Check local rules: many populations are tightly regulated, with seasonal closures, bag limits, and protected runs. Large Chinook can accumulate mercury and PCBs; follow consumption advisories, especially for frequent meals and sensitive groups.
Fishing notes
Target run timing, tide or flow changes, and current seams near deep holding water. Troll flashers and plugs in saltwater, backtroll or drift roe in rivers, and keep presentations low and natural near holding lanes and riffle tails.