dont start feeling a soft spot for carp just because you dont eat them (although you can). They are an invasive species that should be kept in check, although attempts are pretty helpless, they populate too quickly.
sounds bad but a good carp is a dead carp. Fertilize a field with them, give them to an aviary for birds to eat, give em to trappers for bait, set up a bait pile for coyotes. Plenty of ways to use them besides eating them.