Oceanus, one of the most powerful deities of the sea, was, according to Homer, the parent of all the gods, and on that account received frequent visits from the remainder of the deities. He is represented as an old man, with a long, flowing beard, and sitting upon the waves of the sea. He often holds a pike in his hand, whilst ships under sail appear at a distance, or a sea monster stands near him.
Oceanus presided over every part of the sea, and even the rivers were subjected to his power. The ancients were very reverential in their homage to Oceanus, and worshipped with great solemnity a deity, to whose care they entrusted themselves when going on any voyage.
He was the father of the Oceanides to the number of three thousand.
"Three thousand graceful Oceanides
Long-stepping, tread the earth, or far and wide
Dispersed, they haunt the glassy depth of lakes,
A glorious sisterhood of goddess birth."
Hesiod.
Thetis, one of the sea deities, was daughter of Nereus and Doris and is often confounded with Tethys, her grandmother. She was loved by Neptune and Jupiter; but when the gods were informed that her son would become greater than his father, they ceased their addresses, and Peleus, the son of Æacus, was permitted to solicit her hand. Thetis refused him, but the lover had the artifice to catch her when asleep, and by binding her strongly, prevented her escaping from his grasp. When Thetis found she could not elude the vigilance of Peleus, she consented to marry him, though much against her inclination. Their nuptials were celebrated on Mount Peleon with great pomp, at which all the deities attended.