How are our oceans divided and linked?

The five oceans from smallest to largest are: The arctic, Southern, Indian, Atlantic and Pacific.

These five oceans are connected and are actually one huge body of water, called the global ocean or just the ocean. If you were to add the smaller seas like the barents, beaufort, chukchi, Kara, Laptev, East Siberian, Licoln, Wandel, Greenland and Norwegian, etc. you would have a total area of the ocean of about 361,000,000 km2 (which is 71% of teh earths surface) a total volume of roughly 1,370,000,000km3, and an average depth of 3,790m. Our hydrosphere ( ocean plus all freshwater in ground water, lakes, rivers, snow, ice and the atmosphere) makes up about 0.023% of the total mass of the earth.

The Arctic Ocean

The arctic ocean is divided by an underwater ridge called the lomonosov ridge into the 4,000-4500m deep eurasian or nasin basin and the 4,000 m deep North American or Hyperborean basin. The topography of the arctic ocean bottom varies consisting of fault block ridges,abyssal plains, and ocean deeps and basins that have an average depth of 1,038m due to the continental shelf on the eurasian side.

The Southern Ocean

The Southern Ocean is the world's fourth largest body of water. It encircles Antarctica and is actually divided among the Atlantic, Indian, and Pacific Oceans. This ocean is predominantly deep water, averaging 4,000-5,000m deep, and includes the Antarctic continental shelf, an unusually deep and narrow area with an edge of 400-800m deep. (over 270-670m deeper than average.) The lowest point is 7,235m deep at the southern end of the south sandwich trench.

The Indian Ocean.

The indian ocean is the third largest in the world and makes up approximately 20% of the earths water surface. It is bounded by southern asia in the north, the arabian peninsula and africa in the west, the Malay Peninsula, Sundra Islands and Australia in the east and the Southern Ocean in the south. The 20 degree east meridian seperates the indian ocean from the atlantic ocean and the 147 degree east meridian seperates it from the Pacific Ocean. 

The Atlantic Ocean

The Earths second largest ocean is the atlantic, a name derived from "sea of atlas" in Greek mythology. It covers approximately one fifth of the entire global ocean. Water drains into the atlantic  from a land area four times the size of both the Pacific and Indian Oceans.

The Pacific Ocean

The pacific is teh worlds largest body of water and was named by the portugese explorer Ferdinand Magellan who found teh Pacific very peaceful  ( "pacifique", means peaceful in French) for most of his journey from the straits of Magellan to the Philippines. In contrast to its name, the islands of the "peaceful ocean" are often slammed by typhooons and hurricanes.