Kraken is a boss mob that currently spawns in the ocean biome. It was added in the "Vamos a la Playa" update. It drops a kind of leather (kraken skin) used for the diving suit and the super hammer. The kraken is able to climb onto bridges. No matter what helmet the player is wearing, this fiendish monster will kill the player in 3 hits.
This is easily the strongest and hardest mob to kill in the game, beating even the dragon at difficulty to kill, as it is faster than a player in the water, and deals much more damage. It is recommended to use walls (or other structures) to block the kraken around it. It is similar to the technique used when defeating dragons, and yet this may need a player to bait it.
When you get its skin, you can use it for a super hammer or a diving suit. You could also bring it to the edge of a land biome, such as the winter or the forest and continue to attack it. Also, be careful to not let it slide back into the ocean. If he leaves, you have to start from 0. To avoid that, move into the ocean to atract him.
Never fight it in the water, unless you absolutely have to. You most likely will die.
The kraken is easier to fight with a team. One very efficient and easy method to kill him is to build a three by three cube anywhere in the ocean perferably near the beach. You then fill in the right and left side with stone walls then you place 3 doors in the middle. Then you lure kraken inside and use a spear or pitchfork to close all 3 doors the kraken will then be efficiently trapped inside. Then you can easily kill it by swinging through the walls; but be careful not to open the doors.
Kraken is the strongest mob in the game. The kraken has 6000 health and 99 attack damage.