Mizuuo

Mizuuo are uncommon aquatic enemies from Wario Land 3 that are similar to Spray Fish. They appear at night only in Out of the Woods, where two of them appear in the area with water currents (and falling leaves after an event). They visibly swim around underwater, and occasionally surface to spit out a large drop of water, which stuns Wario and knock him backwards, potentially into the water containing heavy currents.