Nomenclature. They essentially both mean "big body of water". Something that has "Ocean" in its name is probably larger than something that has "Sea" in its name, but the two words are more or less synonymous when not part of a proper noun.
marine turtles live in oceans.
The Oceans is: North Atlantic Ocean The Sea is: The Mediterranean Sea.
sea
The Dead Sea is 33.7 % Salinity - The oceans average 3.5% salinity. So the Dead Sea is Roughly 10 times a salty as the Oceans. ----------------- I found another source (wikipedia.org)that states that the Dead Sea is 8.6 times as salty as the sea.
In oceans and sea
Sea pigs live in oceans.
Mediterranean Sea
the seas that border Europe is the black sea the Aegean sea the Mediterranean sea the north sea the Celtic sea and the Baltic sea.
Only the Caspian Sea touches Kazakhstan, but no oceans.
There are no ocean surrounding Israel, only the Mediterranean Sea and the Red Sea.
That sea is called the Greenland Sea.
The Antarctic Ocean, more correctly known as the Southern Ocean. There are also several seas: Amundsen Sea, Weddell Sea, Ross Sea and Bellingshausen Sea