I’ve caught fish that were disgusting before, and I’ve caught fish covered in leeches. But this was the first fish that was visibly deformed. You can see that this sunfish has a kink in its tail, as if it had a piscine spina bifida.
This one was caught on Barton Creek. Despite the mutation, it fought well and seemed to be reasonably healthy. I threw it back, and as far as I know it’s still fine.