NMFS is temporarily closing the U.S. commercial fishery for Pacific bluefin tuna in the eastern Pacific Ocean (EPO) through December 31, 2017, because the 2017 catch limit of 425 metric tons has been exceeded. This action is necessary to prevent the fishery from further exceeding the applicable catch limit established by the Inter- American Tropical Tuna Commission (IATTC) in Resolution C-16-08 (Measures for the Conservation and Management of Pacific Bluefin Tuna in the Eastern Pacific Ocean).