The Kraken is a sea monster in the Pirates of the Caribbean films. The monster made its first appearance in Pirates of the Caribbean: Dead Man's Chest as the quinary antagonist, portrayed through computer-generated imagery. The Kraken is heavily based on the mythological creature of the same name. The Kraken makes a final small, though symbolic, appearance in the third film in the series, Pirates of the Caribbean: At World's End.
In the films, the Kraken is a sea creature of monstrous proportions that is controlled by Davy Jones, supernatural ruler of the ocean realms. When commanded, it destroys anything Davy Jones desires, by means of crushing the ship, dragging it below the water, or just picking off the crew one by one. The Kraken is used often by Jones to destroy ships that threaten him. One of the Kraken's most powerful weapons is fear, which can be used to keep a foe at bay, eliminating the threat altogether.
The Kraken's tentacles about to destroy a ship
The Kraken dragging the "Edinburgh Trader" to the depths