USS Mero (SS-378), a Balao-class submarine, was a ship of the United States Navy named for the mero, any of several large groupers found in warm ocean waters. Mero was laid down by Manitowoc Shipbuilding Co., Manitowoc, Wisc., 22 July 1944; launched 17 January 1945; sponsored by Mrs. Henry G. Taylor; and commissioned at Manitowoc 17 August 1945, Commander John H. Turner in command.