Mich. Comp. Laws § 324.47316
A person shall not ship or transport within this state any fish in packages or containers without plainly and correctly marking each package or container with the name of the consignor and the kinds of fish contained in the package. A railroad company, boat line, express company, motor truck company, aerial freight or express company, or other transportation company or common carrier, or any agent of any such company, or the owner of any boat, airplane, car, truck or other vehicle operated privately or as a common carrier, or the agent or representative of such owners, shall not accept for shipment or transport any package or container of fish unless it is properly marked as prescribed in this section. The presence in any package or container of 10% by weight of any fish that is illegal to ship shall make the entire contents of the package or container subject to seizure as an illegal shipment.
MCL 324.47316