Gyūki


 * Name:
 * Creature Type: Unknown; appears to be a cephalopod
 * Host: An unknown Cloud-nin
 * Unique Traits: Unknown
 * Status: Active, sealed in host

The Eight-Tailed Beast is currently one of the two remaining Tailed Beasts that was not extracted by Akatsuki, while the other one being the Nine-Tailed Demon Fox. Due to Akatsuki's depleted numbers, Madara Uchiha ordered Team Hawk to capture the Eight-Tailed Beast. The Jinchūriki is a musclebound Cloud shinobi who appears to dislike light. He also carries eight swords and on right shoulder has a tatoo that says "iron", and on his left cheek has a picture of a bull's horn.

Speculation
As most of the other Tailed Beasts are based upon mythological creatures, it is speculated that the t-Tailed Beast is based upon the eight-headed and eight-tailed dragon, Yamata no Orochi. But from the shadow when Sasuke goes to retrieve the beast, it seems to be an octopus