Oceanus

Oceanus is the eldest of the Titan children. Often called the 'Father of the Waters', he is a son of Ouranos and Gaea, and the Titan of the Sea. He was the Titan of the ocean that encircled the flat earth. His Roman counterpart is Ocean. Oceanus is the husband of Tethys who bore him the Oceanids. He is the predecessor of Poseidon as the Ruler of the Seas and Lord of the Waters.

History
Oceanus had decided against helping his brothers slay their father out of fear. Oceanus' consort is his wife Tethys, and from their union came the ocean nymphs, also known as the three-thousand Oceanids, and all the rivers of the world, fountains, and lakes. From Kronos, of the race of Titans, the Olympian gods have their birth, and Hera mentions twice in the Iliad about her intended journey "to the ends of the generous earth on a visit to Oceanus, whence the gods have risen, and Tethys our mother who brought me up kindly in their own house."

In most variations of the war between the Titans and the Olympians, or Titanomachy, Oceanus, along with Prometheus and Themis, did not take the side of his fellow Titans against the Olympians, but instead withdrew from the conflict. In most variations of this myth, Oceanus also refused to side with Kronos in the latter's revolt against their father, Ouranos.

Eventually Oceanus retreated to the deep sea, by his own will, and was succeeded by Poseidon as ruler of the seas.

The Last Olympian
Oceanus was neutral in the first war, but Kronos convinced him to fight against the gods, more specifically Poseidon. He enlists Aigaios as well as many ancient monsters against Poseidon, and they battle constantly, leaving Poseidon weakened. It should be noted that Amphitrite is his daughter and that she joins forces against her father along with her husband Poseidon. Oceanus and his forces attack Poseidon underwater, making his palace endangered and also making him unable to aid the Olympians in their fight against the monster, Typhon. When Poseidon chose to aid the Olympians, Oceanus probably did serious damage to Poseidon's palace. After Kronos was defeated, he retreated back into the depths.

Appearance
Oceanus is often depicted as having the upper body of a muscular man with a long beard and horns (the horns are often represented as the claws of a crab), and the lower torso of a serpent. In The Last Olympian, he was described by Percy as a merman larger than the rest with the horns of a bull. He appeared to be riding a chariot pulled by crayfish with a serpent as a weapon.

Abilities

 * He presumably has the standard powers of a Titan.
 * Hydrokinesis: Being the father of waters and Titan lord of the sea, he has absolute control over water.
 * He can bring forth great hurricanes and storms.
 * He can unleash huge tsunamis and tidal waves.
 * Oceanus is the only known being who can challenge Poseidon, as he is shown to have similar powers as that of Poseidon. Oceanus also managed to gather other sea gods and ancient monsters to attack Poseidon on many fronts.
 * Tongue of the Old Times fluency: According to Tyson in The Battle of the Labyrinth, this is the ancient language that Gaea spoke to the Titans, Elder Cyclops and Hekatonkheires before the birth of the Olympian gods. Hence, Oceanus understands and speaks it perfectly.

Trivia

 * As Titan of the great earth-encircling river Oceanus, he is the source of all fresh water on Earth.
 * Oceanus is the eldest Titan of all.
 * Oceanus is Kronos' only brother who was not involved in the murder of Ouranos, or the First Titanomachy.

Océano