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.
Akira Kubo
Taro Kudo
Yukiko Kobayashi
Saki, native girl
Atsuko Takahashi
Ayako Hoshino
Yoshio Tsuchiya
Dr. Kyoichi Mida
Tetsu Nakamura
Chieftain Ombo
Sachio Sakai
The Editor (uncredited)
Kenji Sahara
Makoto Obata
Yū Fujiki
Promotion Division Manager (uncredited)
