A fish hatchery is a facility where fish eggs are hatched and the fry raised, especially to stock lakes, streams, and ponds. More information on Michigan fish hatcheries can be found here.

A fishing weir, or fish weir, is an obstruction placed either wholly or partially across a river, which is designed to hinder the passage of fish. Weirs are historically used to catch fish, although they can be used to redirect fish as well, and are used by the Michigan Department of Natural Resources to catch salmon and steelhead in order to harvest their eggs. Eggs taken at the weirs are sent to State Fish Hatcheries where they are raised and stocked all over Michigan. More information on Michigan weirs can be found here.