What Japanese submarine sunk the USS Indianapolis?

The Japanese B3-type submarine IJN I-58 sunk the USS Indianapolis (CA-35) on July 30, 1945. The Indianapolis was returning from delivering critical parts for the the Fat Man atomic bomb to Tinian Island.

Out of a crew of almost 1196, only 316 survived. Over 300 were killed in the initial attack; 880 sailors went into the water, and many were killed by shark attacks. As the Indianapolis' mission was highly classified, she wasn't reported overdue or missing, and it was only by sheer luck that the last survivors were spotted by a Navy PV-1 Ventura on routine patrol 4 days after the attack.