At Majuro, "Picuda," now under the command of Evan T. Shepard, her final wartime skipper, formed a new wolf-pack with "Queenfish" and "Barb", and departed 27 October. Topping off with fuel at Saipan, 1 November and 2 November, the wolf pack set course to range over the northern waters of the East China Sea, westward of Kyūshū. "Picuda" sent 9433-ton passenger-cargo vessel Mayasan Maru to the bottom of the sea 17 November in the area southwest of Nagasaki. On 23 November, closing a convoy off the Korean Archipelago and stealing between two lead escorts, "Picuda" sank 6933-ton freighter "Shuyo Maru" and 5296-ton passenger-cargo ship "Fukuju Maru". She departed her patrol area six days later and returned from her fourth patrol to moor in Apra Harbor, Guam, on 2 December.