The American version eliminates a sequence wherein a giant walrus, known as Magma or Maguma, is released from the arctic ice and threatens the polar construction site before being killed by the military (however a brief shot showing its corpse is still kept in the American edit). Magma was not in the original script and was included at the insistence of producer Tomoyuki Tanaka. The American version re-arranges the loss of the moon as Gorath makes it's approach to Earth. In the Japanese version the Moon is lost at the beginning of the sequence; the American version re-edits this and makes this the final action before Gorath sweeps past the planet.