Oceanus

Oceanus, sometimes referred to as Ogen or Ogenus, was one of the first generation of Titan, primordial deities which feature in the creation myth of Greek mythology.

Description
As his name might suggest, Oceanus was the living embodiment of the oceanic waters of the Earth. He is commonly depicted as a heavily muscled man with a full beard, and a set of horns which are in fact crab claws. In some versions he is also possessed of a fish-like lower body and wielding a trident. With his consort Tethys, Oceanus is father to the Oceanids, a type of numberless water nymph, and the Potamoi, gods of the rivers and streams.

History
Unlike the majority of his siblings, Oceanus did not take part in the overthrow of their father Uranus, nor did he participate in the ten-year battle against the Olympian gods waged by his brother Cronus and nephew Zeus known as the Titanomachy.

Despite this, Oceanus declined to be a part of the Olympic pantheon of gods, and seemingly spent his entire existence apart from the machinations of all of the gods of legend.