Space Amoeba

The Helios 7 space probe is sent on a mission to study Jupiter when it's hijacked by the alien Space Amoeba, which then crash-lands on an atoll in the Pacific Ocean. The amoeba inhabits the body of a cuttlefish and transforms it into Gezora, a giant monster that begins attacking ships and islands. Taro Kudo and his entourage land on Selgio Island for a photoshoot, but their camp is attacked by Gezora, which can create extremely cold temperatures with its body. After using gasoline to set fire to Gezora, the humans discover that it's vulnerable to high temperatures, leading to its demise.