Who are the tailed beasts sealed in?
Jinchūriki (人柱力, literally meaning: Power of Human Sacrifice) are humans that have tailed beasts sealed within them. They exhibit extraordinary powers due to the immense chakra reserves they possess.
How many tails is Gaara?
Even when he takes on the form of his Eight-Tailed Beast, he is still overwhelmed and is absorbed by the scary new pair of Momoshiki and Kinshiki. When this happens, the series cuts to Gaara as Shukaku warns him of what happens.
Who is the strongest tails in Naruto?
Kurama is the Nine-Tails who resides inside of Naruto. One of the reasons why everyone feared Kurama was not only because he destroyed the Hidden Leaf Village, but because he is the strongest of all Tailed Beastsーnext to the Ten-Tails.