Space Amoeba (Gezora, Ganime, Kamēba: Kessen! Nankai no Daikaijū (ゲゾラ・ガニメ・カメーバ 決戦! 南海の大怪獣, lit. "Gezora, Ganimes, and Kamoebas: Decisive Battle! Giant Monsters of the South Seas"), is a 1970 Japanese science fiction kaiju film directed by Ishirō Honda, and featuring special effects by Sadamasa Arikawa. The film tells the story of extraterrestrial amoeba-like aliens that hijack a probe and, after crash landing on a small South Pacific atoll, create gigantic monsters from native lifeforms (a kisslip cuttlefish, stone crab and mata mata) with plans of conquering the Earth.
The film was released theatrically in the USA in the Summer of 1971 by American International Pictures as Yog-Monster From Space.
The Space Amoeba decides to control two Earth creatures this time: another Ganimes and a mata mata named "Kamoebas". The two monsters raid the human camp. Luckily Kudo realizes the two monsters' weakness: supersonic waves. By releasing a storm of bats, the Amoeba loses control of its creations. Ganimes and Kamoebas, no longer under control, go berserk and begin to battle between them. The humans, using more explosives, cause the volcano to erupt, engulfing the Space Amoeba and the two monsters.
Space Amoeba was released in Japan on 1 August 1970 where it was distributed by Toho. The film was released theatrically in the United States as Yog-Monster From Space in 1971. The film was distributed by American International Pictures with an English-language dub and had a running time of 81 minutes.
The film was released to home video in 2006 as Space Amoeba in its original Japanese language version with English subtitles.