Hydros

[legendary creature] Hydros is a venomous snake from Medieval bestiaries. Their poison caused the victim to swell up, and could only be cured with ox dung. ...
Found on http://en.wikipedia.org/wiki/Hydros_(legendary_creature)

Hydros

[mythology] Hydros (also Hydrus), in Greek mythology, is one of the first primordial gods to emerge forth along with Thesis. Hydros is also sometimes believed to be a child of Chaos and is believed to have emerged alongside the Gods of creation and mud at the creation of the universe. ...
Found on http://en.wikipedia.org/wiki/Hydros_(mythology)

Hydros

primal water god usually appearing as Oceanus.
Found on http://www.chalquist.com/writings/greekmyth/
No exact match found