Lost on or after 29 FEB 1944 with the loss of 81 officers and men on her eleventh war patrol.
USS TROUT topped off with fuel at Midway and was never heard from again. She is presumed to have been sunk by escorts in the middle of the Philippines Basin after sinking a passenger-cargoman and damaging another in a convoy. Japanese records indicate that one of their convoys was attacked by a submarine on 29 FEB 1944 in the area assigned to USS TROUT. Possibly one of the convoy's escorts sank the USS TROUT.
She carried out several notable special missions, including carrying over two tons of gold bullion out of Corregidor in February of 1942.