The One-Tailed Shukaku (一尾の守鶴) or the Shukaku of the Sand (砂の守鶴) is the weakest of the Tailed Beasts. It is said to be a corrupted spirit of a Sand monk from Sunagakure that turned into a demon. It was originally sealed inside a teakettle and then placed inside its first host. It was sealed inside Gaara by Chiyo on the orders of Gaara's father, the Fourth Kazekage, by using Gaara's mother as the sacrifice, but only after being removed from a second host.
The Nine-Tailed Demon Fox (九尾の妖狐) is the most powerful of the Tailed Beasts; a single swipe of one of its nine tails can raise tsunamis and flatten mountains. After the demon fox attacked Konohagakure, Minato Namikaze, the Fourth Hokage, sealed it into his newborn son, Naruto Uzumaki, by using the Dead Demon Consuming Seal, sacrificing his own life to do so.
The Four-Tailed Beast was sealed within an elderly man of unknown origin who was eventually captured by Kisame Hoshigaki. Reportedly, it was a difficult battle for Kisame, who had to face many elemental fusions, rarely seen outside of kekkei genkai. The Four-Tailed Beast was extracted and sealed before the end of the next chapter, leading to the old man's death.
