When a space probe crash-lands on a far-flung Pacific atoll, the craft's alien stowaways decide to take over their new world one creature at a time. Soon, the parasitic life forms latch onto three indigenous critters -- a squid, a crab and a snapping turtle -- and transform them into colossal mutant monsters.

Directed by: Ishirō Honda
Written by: Ei Ogawa
Release date: 1970-08-01
Runtime: 84 minutes
Tagline: An alien aiming for the Earth transforms monsters to attack!
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Cast:
Kenji Sahara Kenji Sahara
Makoto Obata 
Yoshio Tsuchiya Yoshio Tsuchiya
Dr. Kyoichi Mida 
Akira Kubo Akira Kubo
Taro Kudo 
Yukiko Kobayashi Yukiko Kobayashi
Saki, native girl 
Sachio Sakai Sachio Sakai
The Editor (uncredited) 
Yū Fujiki Yū Fujiki
Promotion Division Manager (uncredited) 
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Also known as:
  • Yog, Monster from Space
  • Yog: The Space Amoeba
  • Gezora, Ganime, Kameba: Kessen! Nankai no daikaijû
  • Les envahisseurs attaquent
  • Les Envahisseurs de l'espace
  • Los monstruos del mar
  • ゲゾラ・ガニメ・カメーバ 決戦!南海の大怪獣