I don't know if it is edable or not. Most large oily fish in our rivers carry large amount of contaminates are are considered unsafe to eat. Carp over a certain size in Michigan are not recomended for eating over a certain size. Neither are catfish.
There is no way they can compare to walleye or perch or any of the other species that they may very well displace if they get into the lakes.
There is no way they can compare to walleye or perch or any of the other species that they may very well displace if they get into the lakes.