Nice Green Carp!
You know what I find amazing? Massachusetts and Indiana's state records are in the ball park if not larger and of course much farther north.
Mass 15 lbs. 8 oz. (caught through the ice). Indiana 14 lbs. 12 oz.
The Indiana state record came from a private pond that is loaded with frogs and the Massachusetts state record came from a pond that is connected to saltwater and receives large migrations of alewives.
Maybe feed trumps a longer growing season?
Actually Massachusetts bass average larger than Indiana bass but I don't know why.