|Romanized Name:||Kai Ō Rui|
|English Name:||Sea King|
Sea King species consists of radically different physiques and builds, so unique that no two individual Sea Kings have been recorded as being of similar build. They are serpent-like in appearance. Some may have arms and legs and one particular sea king even was noted to look like an oversized frog. Despite this, they are normally different enough to be determined from other types of sea monsters.
They are classified in the One Piece world as a type "C" creature, which is the "Big Savage" group of creatures. They will attack anything that comes within reach of them and are savage predators. In the storyline, they were seen as sea monsters who attacked without mercy and were ruthless, which led many to fear their strength and presence.
Abilities and PowersEdit
Sea Kings make trade and travel difficult for anyone trying to cross the water where they are found as they are exceptionally fierce and strong compared to many other sea creatures. They are powerful predators and attack unprovoked with no fear or signs of backing down, the only exceptions was in the cases where they themselves were the hunted. Cases have arisen where some islands in the Grand Line close to the edge of the Calm Belt (their natural breeding ground) have ended up getting almost completely cut off from the rest of the world