After using his Hydrification Technique to merge with a water source, Suigetsu can form a giant wave that resembles a demon-like fish. Suigetsu can use this form to battle larger opponents, or he can use it to shield allies from attack. Though it was strong enough to physically push back Killer B in his Tailed Beast Mode, it was not strong enough to withstand a point-blank range Tailed Beast Ball, which rendered Suigetsu unconscious, causing him to fall into a jelly-like state.
Tate-eboshi is tall and straight eboshi. An eboshi (烏帽子) is a tall hat worn by Japanese male aristocrats since the Heian period.