Gamera vs. Zigra (1971)

A mysterious spaceship from Zigra obliterates a moon base, revealing a sinister plot to conquer Earth and exploit its oceans for the alien creatures residing there. As chaos ensues, Gamera emerges as humanity's last hope, rallying support from across Japan. The giant turtle must confront the extraterrestrial threat, battling to protect the planet and its inhabitants from destruction. With the fate of Earth hanging in the balance, the stakes have never been higher as Gamera takes on this formidable foe.