personal completion of 12 war patrols. Blackfish underwent a refit that lasted until 10 March 1945, during which her crew recuperated at Camp Dealey. The crew commenced training on 17 March, and Blackfish again was ready for sea by 20 March 1945 with a new air exhaust blower that dramatically improved the air quality aboard her. Eleventh war patrol On 21 March 1945, Blackfish stood out of Apra Harbor and shaped a course for the Luzon Strait-Formosa area and the general area of the South China Sea to conduct her eleventh war patrol. She again operated as part of a wolfpack, which also included the submarines , , and . Tigrone′s commanding officer served as overall wolfpack commander. The wolfpack arrived in its patrol area on 26 March 1945. Believing that there was little chance Blackfish would encounter targets, Sellars wrote that day that he assumed that the wolfpack would patrol off Batan Island for a few days "looking for a good bombardment spot" and Japanese submarines, since there is nothing else for us to do." On 27 March, Blackfish reconnoitered Batan Island and took photographs. While she was doing so, her galley went up in flames as a result of a deep fryer fire, but her crew contained the fire. Blackfish identified a suitable bombardment target — a Japanese radio tower — on Batan Island on 29 March 1945. She surfaced at 18:04, and just as the sun was setting she closed the shoreline at full speed and opened gunfire from . Her crew observed several direct hits, which threw up earth and debris around the radio tower. Following the attack, Blackfish heard and saw nothing of the Japanese on shore, but her sound operator picked up screw noises at a distance and she disengaged. After another day of uneventful patrolling, Blackfish′s crew on 31 March 1945 observed two Japanese towers with gun emplacements on Pratas Island and decided to bombard them. Her , 20-millimeter, and 50-caliber machine-gun fire devastated the Japanese emplacements. As with the previous attack, the Japanese did not respond. Blackfish made a speedy withdrawal after detecting nearby aircraft. On 2 April 1945, Blackfish was patrolling and conducting lifeguard duty near Pratas Reef. Just before 12:00 she sighted several junks. Her crew manned their battle stations, but the small ships were determined to be "friendly." Blackfish moved alongside one of the junks and a hospitable interaction