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 with 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 crew. 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 a kraken on their way to Fishman Island. the massive creature apparently had taken shelter beneath the Downward Plume while 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, expresses his wish to "tame the little guy" with excitement, much to Caribou's shock.

Luffy, Sanji, and Zoro leave the Sunny in bubbles created by Caribou's devil fruit ability to fight the Kraken without bursting the protective bubble around the Sunny. Sanji burns one of his the Kraken's arms off with Diable Jambe then Zoro cuts off three more arms off with a new technique. Luffy gets upset because he wanted to tame the Kraken as a pet. Luffy then uses Gear Third and imbues the attack with Buokosho Haki. The attack defeats the Kraken even while Luffy is being severely weakend by the seawater. The Kraken is last seen plummeting torwards the blackest depths along with the trio.