It's probably a PB, though it came from my own pond so I'm not counting it. Kind of like fishing from a personal aquarium. I believe it's the only one that size in the pond.
We live on what was my grandparents place, has a decent sized pond and a hand built in ground cement swimming pool 24 x 48. The pool is a lot of work to maintain. Every year it needs drained, cleaned and patched from all the leaves, algae, toad and frog eggs, and cracks that develop over winter from freezing. For two years after my mom passed away I didn't bother to get it ready for the summer. I think one of the neighbor kids caught a decent sized bluegill and LMB and put them in the pool. For a year or two I saw them swimming in the pool. The next time I went to get the pool ready I tried to catch them on a rod to put them back in the pond. I didn't catch them so once the water was low enough I ended up netting them and putting them back in the pond 2 years ago. At the time the blue gill was the biggest I had seen since I was kid, as far as I can remember. Not sure what it was eating in the pool but it must have been eating good.
I was actually wondering if it was still alive, as this is the first time I've caught it in those 2 years. Most of the fish in the pond are stunted, bluegill, LMB, couple yellow perch and 6 crappie I put in this year because I didn't want to fillet them, so I'm pretty sure it is the one that lived in the pool for a year or two.