There's a 20-inch bass in a local public pond I occasionally fish that has a very distinguishing characteristic...a big split in its pectoral fin.
I've caught her while flyfishing 3 times this year, the most recent being last night on a blockhead-style popper.
(October 2)
Here you can see the fin:
And here's the mug shots from earlier this year:
(4th of July)
(May 29)