Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.47320

Sec. 47320. A person engaged in lifting pound nets, trap nets, or seines in the waters of this state shall not take from the waters of this state any undersized fish, and all undersized fish found in the nets fished in those waters shall be returned to the waters with as little injury as possible by the person or persons lifting the net or nets. For the purpose of this part, undersized fish are fish of a smaller size than established by this part.