USS Redfin (SS/SSR/AGSS-272), a Gato-class submarine, was a ship of the United States Navy named for the redfin, any of several North American fishes with reddish fins. Construction and commissioning Redfin was laid down 16 February 1942 by Manitowoc Shipbuilding Co., Manitowoc, Wisconsin; launched on 4 April 1943, sponsored by Mrs. B. B. Wygant; and commissioned on 31 August 1943. Service history World War II First war patrol, January – March 1944 Departing New Orleans 15 October 1943, Redfin proceeded to Fremantle, Australia. On her first war patrol 4 January to 17 February 1944, she encountered an enemy convoy of four ships in the South China Sea 16 January and damaged the Imperial Japanese Navy destroyer . From 8 March to 14 March, she patrolled north of Australia to defend against a possible Japanese attack. Second war patrol, March – May 1944 On her second war patrol 19 March to 1 May, Redfin sank the 1,900-ton Japanese destroyer Akigumo off Zamboanga, Mindanao, 11 April. During the night of 15 April – 16 April, she sank two Japanese passenger-cargo ships, Shinyu Maru, 4,621 tons, and Yamagata Maru, 3,807 tons. On the night of 22 April – 23 April, she landed four of her crew near Dent Haven, Borneo, to evacuate a British reconnaissance party. Attacked by the Japanese, the landing party returned to Redfin, but the British agents were later evacuated by an Australian officer, and transferred to . Third war patrol, May – July 1944 On her third war patrol, 26 May to 1 July, she landed six Philippine guerrillas on a small island near Balabac Strait 8 June. Proceeding to scout the enemy naval base at Tawi Tawi, she sank the 5,142-ton Japanese tanker Asanagi Maru on 11 June. She also warned American forces in the Marianas of the departure from Tawi Tawi of the Japanese task force that was later defeated in the Battle of the Philippine Sea on 19 June and 20 June. Operating off Leyte on 24 June, she sank the 3,028-ton Japanese passenger-cargo ship Aso Maru, before returning to Fremantle. Fourth, fifth, and sixth war patrols, August 1944 – September 1945 Departing Fremantle 6 August, she laid a minefield off the west coast of Borneo on 19 August and rescued eight survivors of at Palawan Island on 30 August. After lifeguard duty for airstrikes against Balikpapan, Borneo, she departed Fremantle 26 October, and sank the