1. Short title This Act may be cited as the Great Lakes Mass Marking Program Act . 2. Findings Congress finds that— (1) the Great Lakes have experienced rapid changes in recent years due to— (A) the introduction of multiple aquatic invasive species; (B) alterations in the food web; and (C) decreases in the abundance of prey species; (2) due to rapid biological change in the Great Lakes, the Great Lakes need a collaborative, science-based program to assist in making management actions regarding fish stocking rates, the rehabilitation of important fish species, and habitat restoration; (3) the States of Illinois, Indiana, Michigan, Minnesota, Ohio, Pennsylvania, New York, and Wisconsin and Indian tribes in those States, working through the Council of Lake Committees of the Great Lakes Fishery Commission, have identified that mass marking is— (A) a precise tool to keep hatchery-produced fish in balance with wild fish; and (B) essential to achieving fishery management and research objectives through producing a better understanding of— (i) the quantity of hatchery produced fish compared to wild fish in the Great Lakes; (ii) the effectiveness of hatchery operations; and (iii) the effectiveness of fishery management actions; (4) the mass marking program of the United States Fish and Wildlife Service in the Great Lakes— (A) was initiated in 2010 on a limited scale; (B) annually tags approximately 8,000,000 of the hatchery-produced fish stocked in the Great Lakes; (C) is a basinwide cooperative effort among the United States Fish and Wildlife Service, Indian tribes, and State management agencies; and (D) produces data used by State and tribal fish management agencies to make management decisions regarding Great Lakes fisheries; (5) annually, Federal, State, and tribal agencies stock approximately 21,000,000 hatchery-produced fish in the Great Lakes to support— (A) native species recovery; and (B) recreational and commercial fishing