The Water Clone Technique uses water as a medium to create clones of the user. Like shadow clones, these clones have displayed the ability to perform techniques. Unlike shadow clones, however, water clones only possess one-tenth of the user's power. Perhaps uniquely, these clones can also be used as the source for another technique; after creating the clones, Kisame for example, then used them to perform the Water Prison Technique. When these clones are struck with a sufficient amount of damage, they will revert to their water form.
Kisame noted that this is a technique which originates from Kirigakure.