Surume

The kraken is a sea monster which dwells in the deepest parts of the ocean.

Appearance
The kraken is massive octopus-like creature several hundred times larger than the Thousand Sunny. Unlike a regular octopus, it has a turtle-like head instead of its mouth being a beak between the arms.

Personality
In Norse mythology, the kraken is said to have dragged dozens of sailing vessels down into the ocean to devour its passengers. Indeed, when the Straw Hats first encounter one on their way to Fishman Island, several crushed pirate ships can be seen between its massive tentacles, indicating that it feeds on the ships and crew it pulls down into the ocean. Caribou recites a story about it, calling it "the enemy of the human race" and that it "never knows satisfaction where killing is concerned." He found it odd that one would be living near the Red Line.

History
The Straw Hat Pirates first encountered the kraken on their way to Fishman Island, the massive creature apparently having taken shelter beneath the Downward Plume and feeding off of the passing pirate ships attempting to make their way through the Red Line for the past few days; several crushed ships can been seen clutched between its tentacles. While the rest of the crew comments on the creature's sheer gargantuan size, Luffy, undeterred, express his wish to "tame the little guy" with excitement, much to Caribou's shock.