Those sturgeon on the Klamath get huge!
I remember a video of a guy in an inner tube hooking into one at least six feet long.
Summer of 64, when I was 18, Dad caught a 5 footer. A couple weeks later, I caught a 6 footer. above the mouth of the Klamath, near Klamath Glen.
First time I got it up to the shallows, I made the mistake of grabbing the narrow part, just ahead of the tail, and discovered the little ‘fins’ are very sharp, bony scutes.