Our Oceans

The original concept of ocean, which means a great river encircling the mother earth, goes back to the time of Mesopotamian and Indo-European civilizations. Samudra from Hindu mythology was imagined to be a celestial water body ruled by Varuna. Actually oceans as we know today are interconnected body of salt waters often referred to as the World Ocean or global ocean though arbitrarily divided into five separate oceans. Global ocean circulations greatly affect Earth's climate by transferring warm or cold waters and associated precipitations to coastal regions.
Some useful links: