Watersnake

The Watersnake is a species of sarpent that is either made of water or resides within it.

=In fanon games=

In Pikmin E
The Watersnake is an enemy exclusive to Mission Mode in Pikmin E, found only in the Cavern of the Wraiths. It is a long, snake-like creature formed out of water. Upon defeat, it splashes away and drowns nearby Pikmin. On contact, it will pull Pikmin into its form and drown them.