I caught a sturgeon the other day that had a deformed spine. It was S shaped. I got another one a few years ago w/o a tail, just a nub. It was 40" long and would have been 46"+ with a tail.
I caught a steelhead two summers ago that was chrome bright from the head to its mid-section and black from the mid-section to the tail. I let it go, it was weird looking. those are the ones I can remember off the top of my head.- John