I have a lot of these in my back pond that tend to get up in the pool this time of year:
Cottonmouths/Water Mocc whatever ya call them in your area - they arent real confrontational - but they do have a nasty bite
I had a friend move into my pond that has definitely cut down on the population and is the only reason he was allowed to stay:
He's gone from 3 ft long last year to a little over 4 ft this year so he's eating good
