Oodako is a giant octopus created by Toho Studios that first appeared in the 1962 Godzilla film, King Kong vs Godzilla.
In King Kong vs. Godzilla, the Giant Octopus crawls ashore on Farou Island and attacks a village hut in an attempt to get the special soma berry juice that the natives store there. The natives, along with members of a pharmaceutical company, attempt to defeat the Giant Octopus with spears and shotguns, but to no avail. King Kong then appears behind a giant wooden fence, crumbling it with his bare hands and throwing the pieces at the Giant Octopus. Kong grabs the Giant Octopus, but the octopus holds tightly on to Kong's head. After a short struggle, Kong pulls the monster off and throws it to the ground. He then throws two boulders at the Giant Octopus's head. The Giant Octopus flees back to the beach and presumably returned to the sea