I'm so glad you posted the right techniques! xD
*starts collecting Water Release chakra in his abdomen*
When he feels like he has enough of it, he stops and starts transferring it towards his gullet and beyond. After only a few seconds, the chakra gets to his mouth and then completely out oh his body. He swiftly uses nature manipulation and starts making water out of it. He doesn't let the water uncontrolably spread but he takes control over it and with using shape manipulation, he starts forming a shark. He carefully plans every piece of the shark from the tail to his head and after a really short amount of time, he done with it. At the same time when he's started making the first shark, he's aslo started making the second two shark and when he finishes making the first one, he finishes with all three of them and simultaneously, he releases all there of the shakr towards a training doll. As all of them strike the doll, it gets serious cuts all over it and if it was a reall, those would be deep injuries.
*performs Dragon → Tiger → Rabbit hand seals*
While he's performing the hand seals, he starts gathering Water Release chakra in his stomach. After a while, he has enough of it and starts moving it towards his mouth. When the chakra gets out of his mouth, he uses nature manipulation and turns it into actual water. This time, he doesn't worry much about the shape, so he only uses shape manipulation to properly direct the stream that he's creating towards the training doll. As he's creating the water jet, he lets it rapidly go towards the doll and while doing so, makes it spread a bit in width, making it better for striking larger targets but nothing too large. As the jet gets to the dool, its power knocks it down and also makes it 'drown' in a water surface that the technique created.
*gets to that puddle that he's created with the previous technique*
He enters the puddle and while he's doing so, he starts channeling Water Release chakra all over his body. This time, it takes a bit longer because he has to let the chakra experince every single part of him. When he fully enters the water, he's done with collecting chakra. Now, he slowly starts expelling parts of the gathered chakra through his body into the surrounding water and keeps some of the chakr ain him and with that, creates something that's in his mind a perfect balance. He camouflages himself by making his body look exactly like the water he's in, making him invisible to the naked eye. Any normal person wouldn't notice him because he becomes one with the water.