Caught a 14 pound coho at B10 this year that was just like that one, either scoliosis or lordosis, very common condition in hatcheries, we used to call them "tractor fish". Most don't survive after release as they can't swim quite as fast as their bretheren, but in these good ocean conditions apparently they don't have to.
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The fishing was GREAT! The catching could have used some improvement however........