USN:
USS Batfish (SS-310), a Balao-class submarine famous for sinking 3 Japanese submarines in 4 days. She is seen here at Muskogee, Oklahoma, USA
On the 10th of February 1945, the
Batfish torpedoed a Japanese submarine north of Luzon in the Phillipines. Some theorise that this was the Ro-100-class submarine Ro-115, while speculate that it may have been the Kaichū VI submarine Ro-55. Ro-115 had unsuccessfully attacked a US aircraft carrier northwest of Rota in the Marianas on June 19th, 1944. Ro-55 was on her first patrol at the time of her loss.
On the 11th, the
Batfish sank another Japanese submarine near Camiguin in the Phillipines. This is believed to be another Ro-100-class boat, Ro-112. The
Gato-class submarine USS
Rasher (SS-269) had unsuccessfully attacked Ro-112 on the 19th of March 1944.
On the 13th, yet another Japanese submarine fell victim to the
Batfish, this time in the area of the Babuyan Islands in the Phillipines. This was most likely yet another Ro-100-class submarine, namely Ro-113. Ro-113 was the last Japanese submarine to find success in the Indian Ocean, torpedoing and sinking the 3827 GRT steamer
Marion Moller on the 6th of November 1944.
Her
Wikipedia page.
Notable events from her patrol logs on
uboat.net.