The Orion Maru was sailing across the Pacific with a full capacity of passengers and crew on board. During the voyage, the captain and crew noticed the larval Mothra appear to the ship's starboard. The captain ordered the crew to turn to port, but it was too late. Mothra destroyed the ship, killing all on board, and continued on to Japan in order to search for and rescue the Shobijin.
- The destruction of the Orion Maru is considerably out of character for Mothra, even this early in her filmography, where she is mostly seen only attacking humans if directly provoked by them. In this instance, the ship was simply in the way.