After returning to the patrol area with the wolf pack, she made an unsuccessful attack on a transport on 3 November. The following day, "Sailfish" damaged the Japanese destroyer Harukaze and Japanese landing ship T-111 (890 tons) in Luzon Strait in position 20°08'N, 121°43'E but was slightly damaged herself by a bomb from a patrol aircraft. With battle damage under control, "Sailfish" eluded her pursuers and cleared the area. After riding out a typhoon on 9–10 November, she intercepted a convoy on the evening of 24 November heading for Itbayat in the Philippines. After alerting "Pomfret" of the convoy's location and course, "Sailfish" was moving into an attack position when one of the escorting destroyers headed straight for her. "Sailfish" fired a three-torpedo spread "down the throat" and headed toward the main convoy. At least one hit was scored on the destroyer and her pip faded from the radar screen. Suddenly, "Sailfish" received an unwelcome surprise when she came under fire from the destroyer that she had believed to be sunk. "Sailfish" ran deep after ascertaining there was no hull damage resulting from a near miss from the escort's guns. For the next 4 hours, "Sailfish" was forced to run silent and deep as the Japanese kept up an uncomfortably accurate depth charge attack. Finally, the submarine was able to elude the destroyers and slip away. Shortly, "Sailfish" headed for Hawaii, via Midway, and completed her 12th and final war patrol upon arriving at Pearl Harbor on 11 December. "Sailfish" had damaged the IJN destroyer , which had previously sunk , and also a landing ship.