The Spirit of Dark and Lonely Water

The Spirit of Dark and Lonely Water is the symbolic villain of a PSA campaign in the 70s - his role is to personify the dangers of water and reckless behavior by children that often leds to accidents and deaths.

In the context of the PSA he has sentience and seeks to lure all children he comes across to their death - having power over "show offs, fools and unwary" but being powerless against "cautious children".

As a symbolic personification of evil he is similar to Satan and immortal - existing for as long as people do not obey rules around water or endanger themselves.