The Giant Squid is a villain in the 1954 Disney Film, "20,000 Leagues Under the Sea," based on the book by Jules Vernes.
After it attacks the Nautilus, Nemo orders the submarine to head to the surface in order to battle the creature. It was a losing battle as many lives were lost and Captain Nemo would have died if Ned Land hadn't escaped from his prison. Ned Land easily killed the squid by throwin a harpoon between its eyes, killing it. Nemo was dragged under the water but Ned Land saved Nemo by cutting its arm that was holding him.
Due to being an animal, the squid was not evil, but just trying to eat to survive.