|Three-Tails (三尾, Sanbi)|
|Appears in||Anime, Manga|
Isobu (磯撫, Isobu), more commonly known as the Three-Tailed Giant Turtle (三尾の巨大亀, Sanbi no Kyodaigame), is a tailed beast that was formerly sealed in Yagura of Kirigakure, but was extracted for unknown reasons. It was later captured by Deidara and Tobi, then sealed by Akatsuki. After Akatsuki's fall, it fell into the hands of Ibitsu Uchiha who sealed it within Gedō Mazo.
According to Madara Uchiha, the Three-Tails first came into being near the end of the waning days of the Sage of the Six Paths' life; to prevent its resurgence, the Sage split up the demon's chakra of the Ten-Tailed Beast into nine separate, monstrous constructs of living chakra, which would become known as the tailed beasts.
At some point in the past, the Three-Tails fell into the possession of Kirigakure and was sealed within Yagura, the Fourth Mizukage. It was later extracted from its host for some reason, and escaped into the wild. Because it did not have a jinchūriki, it was not intelligent enough to effectively utilize its great strength, instead being reduced to animal instincts. After Akatsuki's fall, the Sanbi ran free and soon fell into Ibitsu Uchiha's hands.
The Three-Tails primarily resembles a turtle, but with a crab-like shell and three shrimp-like tails. It has no hind-legs, only a pair of fore-legs. Its right eye was constantly closed, indicating some sort of injury, and because of this, it was particularly vulnerable to attacks directed at its left eye.
Other than being a very fast swimmer despite its size, the Three-Tails' abilities were not seen in the manga of Naruto. Madara suggested that Kisame would have been a better choice for capturing the beast, given its affinity for water. It's abilities were greatly elaborated upon later, many of which dealt with its size: it could roar to repel attacks; it could produce a large tidal wave that spread away from it in all directions; it could strike with any of its three spiked tails to break through most defenses. Its skin was resistant to attack in a similar fashion.
Of the beast's more specialized abilities, it could produce a hallucinogenic mist that exploited the victim's insecurities and forced the victim to face them. It could also shoot white, Menacing Ball-like shockwaves. When it swallowed something, thousands of "mini-clones" of itself would attack what it had eaten within its gut, presumably to facilitate digestion.