Yog

Yog is an enigmatic Alien Amoeba which first appears in the 1970 Toho film ''Space Amoeba.

Space Amoeba
Yog comes to Earth onboard a returning Space Probe which re-entered the Atmosphere, and crashed into the South Pacific Ocean. Yog travelled to Sergio Island, and used his powers to possess and transform an Oceanic Cuttlefish, creating Gezora. Gezora rampaged around the island, causing havoc for its inhabitants and the JSDF until the people managed to lure Gezora into a field of flames, horrifically burning the creature and forcing it to retreat into the ocean. As Gezora begun to die, Yog escaped, and possessed a Lobster, forming Ganimes. Ganimes returned to the island, damaging the buildings by slamming into them with its claws, until it was destroyed by explosives. Yog escaped once more, and then divided his life force into another Lobster and a Rock Turtle, forming another Ganimes and Kamoebas. Coordinating the efforts of both, Yog appeared to have control over the island until a swarm of bats flew out of a cave. With Yog now startled, his control over Ganimes and Kamoebas dissipated, and the two monsters clashed. Eventually, both monsters fell into a volcano, killing Yog for good.