The Artificial Whale quietly entered the optimal attacking range and then launched shape-shifting Dolphin torpedoes. A single attack destroyed a Japanese Soryu-class Submarine, demonstrating formidable offensive power. However, the loud noise generated by the attack also spread in all directions through the sea water, alerting all nearby submarines to the explosion.
Other submarines were shocked upon hearing the sudden explosion, and from the direction of the blast, they knew it must have been a Soryu-class Submarine from Japan that exploded. But they had no idea what had happened or what had caused the Soryu-class to suddenly explode. Could the Soryu-class Submarine have self-destructed? But this possibility was extremely slim. Therefore, the most likely explanation was that the Soryu-class Submarine had been attacked. If that was the case, what kind of weapon had attacked the Soryu-class Submarine?