1.5 acres. I do have a large 6ft deep (currently 5ft deep) swimming area that might be good for seining at some point, but I doubt I'll mess with it this season.

My best guess on the 16" bass is that maybe it snuck in with the first batch of fatheads that I put in 2+ years ago. The place I got them was a trout farm (bring your kids to fish) and only sold fatheads on the side. At the time I puchased them, they no longer sold LMB for stocking, but they used to. I did notice one small rainbow trout in that first batch, and it promptly died in the warm water. A small LMB (or a few) would have a much easier time hiding among large numbers of FH minnows, and I probably wouldn't have noticed them. They no longer sell FH there. Yellow bullhead, who knows. There's the old "eggs on birds' feet" scenario, but I always thought the chances would have to be slim on such a small scale and short time period. Construction on the pond was completed a little less than 3 years ago, and this is the first year it's actually full. I don't have any neighbors with ponds and only one that is even close to me...I doubt he'd do anything like that anyway.

My original plan was to go with SMB/YP/RES, so I was certainly a bit disapointed to see a big lmb in there. Luckily (I guess) SMB were too hard to get, RES seem to have some trouble surviving, and my goals have a changed a bit, so I changed plans to go with LMB/BG/YP and I may have some RES and pumpkinseeds as extras to eat snails.