西里伯斯海
"Bluefish" departed Fremantle in May 1944 for a 53-day patrol of the Celebes Sea. On 16 June, she sank the Japanese merchant "Nanshin Maru" (1422 GRT) in the Celebes Sea south-west of Tarakan, Borneo. On 21 June, she sank the Japanese transport "Kanan Maru" (3280 GRT) off the southern approaches to Makassar Strait.