Take a look at this map.
If you have a pond that is not in the red shaded area, and introduce white perch to your pond or watershed, you will have some biologists and state administrators that will be extremely unhappy.
White perch introductions have the potential to create tens of millions of dollars damage to a regional fishery.
DANGER.
I cannot emphasize this enough. DO NOT ATTEMPT TO ACQUIRE, MOVE, OR OTHERWISE STOCK THESE FISH!!!