Gamera vs. Zigra (1971)

In Gamera vs. Zigra (1971), Gamera, the fire-breathing giant turtle, must protect the Earth from Zigra, an alien creature. As Zigra attempts to conquer the planet, Gamera fights back, leading to an epic underwater battle. Along the way, Gamera encounters various obstacles and allies, including a killer whale and a group of humans determined to save the world.