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Names: Three Tails.
Creature type: Giant sea turtle.
Host: None
Unique traits: Extremely fast and has various techniques that involve water including illusion attacks and clones.
Status: Captured and sealed by Akatsuki.

The three-tailed beast is a gigantic, turtle-like demon that Deidara and his new partner, Tobi, captured. This creature may be based on the Genbu or the Kappa.

What abilities this creature possesses remains unclear, as it did little to actually attack the two in its short appearance. It is clearly quite fast despite its size, as evidenced by its ability to keep up with Tobi, who was running on the water at the time. With the three-tails distracted, Deidara molded an explosive clay fish in an attempt to capture it. It's unclear if this marked the end of the battle, as the remainder of the battle goes unseen. Tobi gloated of bringing the three-tails down with his special jutsu, but Deidara thought otherwise. In its last appearance, Deidara is towing the unconscious beast with two large clay birds.

Unlike the other tailed beasts seen thus far, the three-tails lacked a host. It is different from the Shukaku and the demon fox as it isn't intelligent, which makes it little more than a wild animal. According to Deidara, lacking a host made the beast weaker because it wasn't intelligent enough to control its own strength. In the past, the three-tailed beast was imbued within a ninja from Hidden Mist. When Akatsuki captured it, the three-tailed beast was "in the wild," with no Jinchuuriki host.