I'm right across the road from Government Island, I've been wanting to catch some snakehead for years, but that place is so packed every time I've taken my boy there I've just given up.
I DO think there's a rather large snakehead in the runoff pond in my backyard. 10+ years ago, developer and county both said it would be a dry pond...someone *cough* planted water lilies, which thrived, so they could point to them and say "dry pond, huh?" Someone else added goldfish, and a few years later we were looking at the pond wondering if any of them survived, and speak of the devil, one lone goldfish swam out from the lily pads and started feeding at the surface. Then that 1 turned into about 50, huge school of them. We're staring intently, it was kinda beautiful, then WHAM, something big, long and dark struck hard right in the middle of the school. Haven't seen a goldfish since. Suspect it was a snakehead, but it's only a guess.
County actually came out a few years ago to drain it...they took one look and said naaa, we ain't destroying that. They came on a good day, it's not so purty in the winter.