The USS Indianapolis was struck by two torpedoes fired by a Japanese submarine on July 30, 1945. Nine hundred of the 1,196 men aboard the ship made it into the water alive, but only 317 survived. Up to 150 of the men died as a result of shark attacks. Survivors formed groups in the water, but they would quarantine men with open wounds who might attract sharks. When someone in the group died, it was imperative to shove their corpse away, so that the sharks might be sated on dead bodies instead of live ones.”]
Source: https://gizmodo.com/how-a-pair-of-torpedos-led-to-the-worst-shark-attack-in-1085574113