I agree. It's certainly one of the strangest channel catfish I've seen. Spawning male channel cats usually get darker in color and big heads. As this one was on the thin side, I'm guessing this is a post-spawn male.
Even so....I had to take a long look at it...wondering if it was some sort of hybrid.
I don't hear of catfish hybrids. However, a buddy of mine caught a large odd catfish out of his uncle's farm pond. They showed the pictures to the DNR, who said they thought it was a channel cat/bullhead hybrid. It was 6-8 lb range, I believe. I saw the pictures....They weren't close-ups, and I think they were black-n-white film, not color...so it was tough to tell.