The USS Icefish (SS-367) was a Balao-class submarine constructed for the United States Navy during World War II. Launched on February 20, 1944, by the Manitowoc Shipbuilding Company in Wisconsin, she was sponsored by Mrs. Stanley P. Mosely and commissioned on June 10, 1944. Following trials and shakedown operations in Lake Michigan and the Mississippi River, Icefish joined the Pacific Fleet at Pearl Harbor on August 22, 1944, assigned to Vice Admiral Charles A. Lockwood's submarine force. During her wartime service, Icefish conducted five war patrols primarily in the East China Sea, Luzon Strait, and surrounding areas. Her first patrol, starting September 9, 1944, involved operations in Luzon Strait and the South China Sea, where she participated in the intense October 1944 U.S. submarine campaign that sank over 322,000 tons of Japanese shipping, including cargo vessels and transports. Notably, she sank a 4,000-ton cargo vessel and a 10,000-ton transport during this period. Her second patrol in December 1944–January 1945 was less successful, lasting 43 days but ending prematurely due to materiel difficulties. The third patrol, in late February 1945, took her northeast of Formosa, but by the end of the war, her activities diminished as Japanese shipping dwindled. Icefish's fourth patrol included reconnaissance and patrols in the waters around Hainan, Hong Kong, and the Java Sea, with no contacts made. She also performed a rescue mission on June 7, 1945, rescuing six Army aviators off Formosa. Her fifth and final patrol began in August 1945, ending at Saipan in September, shortly after Japan's surrender. She was decommissioned on June 21, 1946, and joined the Reserve Fleet. Recommissioned in 1952, Icefish underwent a GUPPY IB conversion, and later that year transferred to the Royal Netherlands Navy as HNLMS Walrus (S802). She served in Dutch waters, notably patrolling near Dutch New Guinea in 1962. The vessel was returned to U.S. custody in 1971, struck from the Naval Register, and sold for scrapping later that year. Throughout her service, Icefish earned four battle stars for her World War II contributions, marking her as a notable vessel in the U.S. submarine fleet.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.