What a cool photo. Like Dave, I'd be willing to bet that fish is one of your original stockers as well.
You'll get a lot of satisfaction out of watching them grow. It's been my experience, however, that with sufficient time a pond like yours can actually get overpopulated. Fish get stunted, with heads disproportionate to their body size.
Some people people shudder at the thought, but that's when it's time to keep out the makings of a modest fish fry.
Good luck, and good fishing ...
Larry
