intercepted and destroyed by British Force K in the Battle of the Duisburg Convoy. Force K managed to leave Malta without Corallo being able to detect it since it did not pass through her area of operation, but rather through the one controlled by . At sunset, the submarine left her assigned area and moved to her new area of operations off Algeria and Tunisia. In January 1942 she patrolled between Malta and Capo Passero. In March 1942 Corallo again patrolled off Malta. In April 1942 Coralllo was sent to patrol off Cape Bon. At 4:10 on April 28, 1942, off Bona, Algeria, Corallo stopped Tunisian sailboats Dar es Salaam (138 GRT) and Tunis (41 GRT). The boats carried a Vichy France flag, but didn't have a special permit allowing them to sail. Corallo took their crew on board, thirteen men in total, then sank the sailboats with gunfire in the position . In May and June 1942 she patrolled east of the island of La Galite. At 2:00 on June 7, 1942, Corallo stopped another Tunisian sailboat Hady M'Hammed (26 GRT). Believing the boat was carrying materials on behalf of the Allies, captain Adreani ordered the crew of the sailboat (6 men) to abandon ship, took them prisoners and then sank the sailboat with gunfire in the position . Corallo then received an order to patrol another area northwest of Algiers. Upon return to the base, a new commander, captain Guido Guidi, was appointed. On June 11, 1942, the submarine was sent along with four other submarines (, , and ) to patrol the triangle between Malta, Pantelleria and Lampedusa with the task of interception of a British convoy, part of Operation Harpoon. Corallo did not, however, sight any enemy ships. In October 1942 she was sent to patrol an area south of the Balearic Islands. In November 1942 after the launch of Operation Torch she was deployed to patrol an area off Bizerta. Corallo also penetrated into Philippeville harbor, but there were no ships to attack. In early December she was deployed together with , , , , , , , and in the western Mediterranean, as a defensive screen protecting Axis convoys to Tunis. On December 10, 1942, Corallo sailed from Cagliari to patrol an area between Bona and Bizerta with a task of trying to penetrate Bougie harbor during the night of December 13 and destroying