Basilan Island
"Bluefish" departed Fremantle in October 1943 for a 32-day patrol of the South China Sea. On 8 November "Bluefish" torpedoed and sank the Japanese tanker "Kyokuei Maru" (10570 GRT) in the South China Sea. On 18 November "Bluefish" torpedoed and sank the old escorting destroyer IJN "Sanae" and damaged the Japanese fleet oiler "Ondo" (14050 GRT) in the Celebes Sea about south of Basilan Island.