Space Amoeba

Space Amoeba, released in Japan as Gezora, Ganime, Kamba Kessen Nankai no Daikaij ? , lit. Gezora, Ganimes, and Kamoebas Decisive Battle Giant Monsters of the South Seas , is a 1970 Japanese Science FictionKaiju film produced and released by Toho Studios. Directed by Ishir Honda, and featuring special effects by Sadamasa Arikawa, the film starred Kenji Sahara and Yoshio Tsuchiya. The film tells the story of extraterrestrial amoebalike aliens that highjack a probe and, after crash landing on a small South pacific atoll, create gigantic monsters from native lifeforms a Kisslip cuttlefish, Rubble crab and Matamata turtle with plans of conquering the Earth.

The Heliosspace probe is sent on a mission to study the planet Jupiter. While on its outward journey to the gas giant, the probe is overtaken by the Space Amoeba, an amorphous parasitic extraterrestrial. The probe returns to Earth and crashes into the South Pacific, where the Amoeba leaves the device and inhabits the body of a cuttlefish, causing it to mutate into what is called Gezora. The tentacled kaiju begins attacking ships and islands in the area.A photographer named Kudo and his entourage land on Selga Island for a photoshoot, but their camp is attacked by Gezora. Because of its mutation the creature can create extremely cold temperatures with its body. When the survivors discover that Gezora is vulnerable to high temperatures, Kudo and his friends use a leftover Japanese World War II munitions bunker to set fire to the monster. Severely burned, the creature retreats to the water where it dies. ........

Source: Wikipedia