Here are my thoughts on the longetivity of GC, this is based on an over enthusiatic Carp fanatic that will remain nameless from other forums. His claim was that common carp in general lived longer and got bigger in colder northern waters. He was always complaing that in southern waters it was rare to see common carp over 15-20 lbs but in northern waters trophys were much more common, if true this likely holds true for GC as well.
