It's a fighting style, that can only be mastered by those who have trained with the Sharks from Kamishiō. Like with Frog Kata, the user must use senjutsu chakra to "activate" their body in various different ways. Noticeably, when using this fighting style, the senjutsu chakra causes the body to begin to vibrate at high speeds, though these vibrations are so fast that it doesn't appear they are moving at all. The senjutsu chakra used during Sage Mode activates the body in various ways, enhancing the user's speed, strength, stamina and durability. In Shark Kata, the natural energy used by the practitioner to create senjutsu chakra, also surrounds and encapsulates the user as an aura of natural energy. At the same time, the user generates an aura of senjutsu chakra around their body.
The user then mimics a shark in their motions, focusing the majority of their power within their fingertips. By keeping a grounded footing, the user strikes out with a striking motion, much like how a shark strikes, releasing the senjutsu chakra at the moment of impact, causing tremendous damage to any hit by it.
This aura of the Sage's senjutsu chakra can act as an extension of their body and cannot be seen by anyone other than those who have trained in senjutsu.
This aura is used to extend the reach and force of ones physical attacks. The Shark Kata will come to initiate the user's body in order to drastically augment their overall physical condition. This allows the practitioner to perform feats of speed and strength which can far outstrip the average Sage's with their respective fighting style. Due to this, the practitioner's evasions and counteractions are exceptionally more aggressive in nature.