(Suiton: Suikō Teppō no Jutsu) - Water Release: Water Shark Gun Technique
So, just do the same thing and within the water source get three sharks to be summoned and attack you're enemy head on.
(Suiton: Funshutsu Mizu Kinko) - Water Release: Gushing Water Imprisonment
Starting from the bottom at the feet of you're opponent, water will materialize and form a sphere of water around the opponent. This happens rapidly and very quickly. It shall suffocate them as well as they are in water.
(Suiton: Mizurappa) - Water Release: Water Horn
A technique where the water is shot from the mouth and attacking the opponent. Hand seals needed and a good combo for the lava release technique.