Umibōzu

editUmibōzu
海坊主 Umibōzu "Moving Water Prison Technique" (動く水牢の術, Ugoku Suirō no Jutsu) "Sea Monster" (水のバケモノ, Mizu no Bakemono, literally meaning: Water Monster)
Debut
Anime	Naruto Episode #172
Appears in	Anime
Personal
Classification	Summon
Affiliation	Land of the Sea Otogakure
Nature Type Water Release
Jutsu Water Prison Technique Water Release: Gunshot

Umibōzu (海坊主) was used by Amachi to terrorize the Land of the Sea.

Part I

Land of the Sea Arc

Umibōzu itself is nothing more than water that has been gathered and held together by chakra, making it virtually indestructible unless it is completely evaporated. Naruto Uzumaki got swallowed by its indestructible water mass and was completely immobilized, until he gained a burst of chakra from the Nine-Tailed Demon Fox and eventually broke free, shattering it into tiny droplets. During a later encounter, after Umibōzu reformed, Naruto resorted to summoning Gamabunta and it was defeated by Naruto throwing an exploding tag attached to a kunai into Gamabunta's oil, completely evaporating it.