It is unlawful for a person to use or possess Goldfish (Carassius auratus), Comets (Carassius auratus), Koi (Cyprinus carpio) and Common carp (Cyprinus carpio) as baitfish while fishing.
58 Pa. Code § 63.44
The provisions of this § 63.44 issued under the Fish and Boat Code, 30 Pa.C.S. § 2102.