Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.45701

(a) “Mussel” means the pearly freshwater mussel, clam, or naiad, and the shells of the pearly freshwater mussel, clam, or naiad.

(b) “Crowfoot bar” means a bar of any material bearing a series of hooks designed to catch or adapted for catching mussels by the insertion of the hooks between the shells of mussels.

(c) “Hand rod” means any mechanism of capture that is adapted for picking the mussels singly from the bottom of waters and is operated by the picker holding the hand rod in the hand.