This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Nguruvilu (Mapuche)
The Nguruvilu is a creature originating from the Mapuche religion of the indigenous people inhabiting Chile. It is a river-dwelling creature that looks like a fox, with a long body, similar to a snake, and a long tail with fingernails that it uses like a claw. The nguruvilu originates from the ethnic religion of the Mapuche.
It is a river-dwelling creature and looks much like a strange fox, with a long body, similar to a snake, and a long tail with fingernails that it uses like a claw; but it is a water-being. Nguruvilus live in and are the cause of dangerous whirlpools which kill people who try to cross rivers.