barely escaping the attacks of her escorts. She arrived at Midway for refit on 31 July 1944, and for her performance on the eighth patrol was awarded a second Presidential Unit Citation. Sailing the Sea of Japan as a member of another wolf pack on 23 August 1944, Guardfish and the submarines, Thresher and , had a 40-minute surface gun battle with sampans on 2 September. On 25 September Guardfish attacked and sank 873 ton cargo ship Miyakawa Maru #2 and returned to Pearl Harbor on 24 October 1944. Tenth, eleventh, and twelfth war patrols, November 1944 – June 1945 Guardfish left on 26 November 1944 for her 10th war patrol to cruise in the "Convoy College" area of the South China Sea, with yet another wolf pack. She recorded no sinkings on this cruise, but nearing Guam in the early morning of 24 January 1945 she mistook the U.S. Navy rescue and salvage ship , for a Japanese I class submarine. She fired a torpedo which struck Extractor'''s starboard side, causing her to capsize and sink at , within five minutes. Six crew were killed, and the remainder were rescued by Guardfish. This action ended the patrol.Guardfish's 11th war patrol was spent watching for enemy fleet units attempting to escape from the Inland Sea of Japan by way of the Kii Suido between Shikoku and Honshū. Leaving Saipan on this duty on 27 February, she found no ships but rescued two downed aviators on 19 March before returning to Midway on 11 April 1945.Guardfish left Midway on 8 May 1945 on her 12th and final war patrol, and was assigned lifeguard station for the ever-increasing air attacks on the Japanese mainland. She sank a small trawler by gunfire on 16 June, and arrived back at Pearl Harbor on 26 June 1945. Post-war service The veteran submarine served with the training command after her return to Hawaii, helping to train surface ships in the newest antisubmarine warfare tactics until 25 August 1945. She then sailed for the United States, transiting the Panama Canal on 12 September and arriving at New Orleans on 16 September. Guardfish arrived at New London 6 November and decommissioned there on 25 May 1946.Guardfish remained inactive until 18 June 1948, when she was placed "in service" for duty as a Naval Reserve Training Ship at New London. Declared surplus to Navy needs, she was stricken from