Maelstrom Kraken

The Maelstrom Kraken is a kraken that can be summoned like the Wither. It is a blue kraken boss.

Summoning
The Maelstrom Kraken is a boss that can be summoned underwater by finding a rare item in sunken ships, "Sailor's Fragment" which can be crafted together to create the "Sailor's Compass". It will point into a large sunken ship near the edge of a bottomless maelstrom. Using a guaranteed item in there known as the "Forgotten Shard of the Sea", you can summon the Maelstrom Kraken.

Battle
After using the Forgotten Shard of the Sea, the Kraken will appear from the center of the Maelstrom, triggering the start of the battle.