The tailed beast, as you probably know is 1 tailed-Raccoon dog(Gaara), two tail cat (the girl captured in the hidden mist village), three tailed turtle thing and so on.
However 8- tails the second strongest is the snake. The snake has a sword in his body, and the funny thing is that sword is the exact same name as Sasuke's sword he use which he got from the previous owner. The 8 tailed snake is also waiting for a genius that will awaken his full power. Do you think Sasuke is the genuis???
Legend of the Tailed Beasts - Advanced Bijuu Directory - Naruto Forums to learn more.(That's where I got this info.)