I think they are required to be triploid every where, at least every where that I have heard of. If they escaped and reproduced it would be that all or nothing managment on natural lakes. Currently the big head carp is moving up the missisppi river, I think it is as far north as Illinois now. The civilian corp of engineers installed and electric fish barrier on the channel between the river and lake Huron, for fear of them entering the great lakes.
With out triploid g.carp, this could easily happen with them too.
