I caught one like that once while drifting for walleye. It was a colossal pain; unable to remove the hooks while the carp of about 13 - 15lbs was alongside, then thrashed around in the net on the bottom of the boat when landed, getting those trebles extremely tangled in the mesh. A lot of people in North America don't realise carp target the same baitfish and crayfish our more popular species do.