A bill to establish the Great Lakes Mass Marking Program, and for other purposes.

Great Lakes Mass Marking Program Act This bill provides statutory authority for the U.S. Fish and Wildlife Service's (USFWS's) Great Lakes Mass Marking Program, under which hatchery-produced fish are tagged and marked across the Great Lakes basin to be evaluated in terms of their performance in the wild or their effects on the ecosystem. The USFWS must make data collected under the program available to federal, state, and tribal fish management agencies.