Again, this fish did not come from a true ecosystem. It came from a cement canal that runs through the city of Phoenix where it was not supposed to be in the first place. There is no law governing the fish there minus a specific carp that was intentionally placed in the canals to control vegetation growth. You don't even have to have a fishing license to fish the canals but it if you turned around and dropped your line in one of the many ponds close by without a license then you're in trouble but that'd be if a game warden was even around and they are NEVER found around these ponds.