This interim final rule implements a possession limit and increases the minimum fish size for haddock caught in the Gulf of Maine by recreational anglers aboard private or charter/party vessels. This action is intended to address an overage of the fishing year 2010 GOM haddock sub-annual catch limit by the recreational fishery, and prevent a similar overage from occurring in the future. NMFS implements this interim final rule pursuant to its authority under the Magnuson-Stevens Fishery Conservation and Management Act and the Northeast Multispecies Fishery Management Plan and its implementing regulations.