"Redfish" arrived at Pearl Harbor on 27 June 1944. Departing 23 July, she sank the 5,953-ton Japanese cargo ship "Batopaha Maru" on 25 August, the 7,311 ton tanker "Ogura Maru Number Two" on 16 September, and the 8,506 ton transport "Mizuho Maru" on 21 September, all off Formosa, before arriving at Midway Island on 2 October. Departing Midway on 25 October and Saipan on 3 November, she sank the 2,345 ton Japanese transport "Hozan Maru" during the night of 22 November – 23 November. Departing Saipan on 1 December, she combined with the night of 8 December – 9 December to heavily damage the Japanese aircraft carrier "Junyō", putting that enemy ship out of action for the remainder of the war.