Achelous

Achelous is the River God who battled Iolas and Hercules

Mythology
is the son of  Tethys and Oceanus, as a god Achelous has the  its territory is the Achelous River.

Description
He can manifest himself, like a man made of water or, if he wishes, like water

Abilities
The basic powers of an Olympian god, but his specialty is manipulating water

Appearance

 * Hercules and Iolas