The ocean, which the Greeks and Romans regarded as a river circling the world. In Greek mythology it was personified as a Titan, son of Uranus and Gaia.
He married his sister Tethys, and from them came the ocean nymphs, also known as the three-thousand Oceanids, and all the rivers of the world.

Some scholars believe he originally represented all bodies of water, including the Mediterranean Sea and the Atlantic Ocean, the two largest bodies the ancient Greeks knew of. However, as geography became more accurate, Oceanus came to represent the stranger, more unknown waters of the Atlantic Ocean while Poseidon ruled over the Mediterranean.

Consorts/Children

1. With Gaia
   1. Creusa
   2. Spercheus
2. With Tethys
   1. Achelous
   2. Acheron
   3. Alpheus
   4. Amaltheia
   5. Amphitrite
   6. Asia
   7. Asopus
   8. Callirhoe
   9. Catillus
   10. Cebren
   11. Cephissus
   12. Circe
   13. Clitunno (Roman mythology)
   14. Clymene
   15. Crinisus
   16. Dione
   17. Doris
   18. Electra
   19. Enipeus
   20. Eurynome
   21. Inachus
   22. Lysithea
   23. Melia
   24. Meliboea
   25. Merope
   26. Nilus
   27. Peneus
   28. Perse
   29. Philyra
   30. Pleione
   31. Rhode
   32. Scamander
   33. Telesto
   34. Tiberinus (Roman mythology)
   35. Tibertus (Roman mythology)
   36. Tyche
   37. Volturnus (Roman mythology)
3. Unknown Mother
   1. Nemesis