The Pacific is by far the largest of the oceans.
Atlantic Ocean is the most famous ocean in the world.
Their are 5 main oceans:Pacific OceanAtlantic OceanIndian OceanArctic OceanThe southern Ocean
The pacific ocean
The Arctic Ocean
PAcific Ocean the largest ocean in the world.
The ocean that is most north i the world is the Pacific ocean
I'm not sure that I understand your grammatically incorrect question.What IS the major ocean in the world?What ARE the major oceanS of the world?As to the major ocean, being singular... it depends on:Size (Pacific)Usage (I'm not sure which one is used most... I would guess that it depends on the period of time.Just because it is potentially useful for one thing doesn't mean that the other oceans aren't useful for something else.As to the major oceans, being plural, Pacific, Atlantic, Indian, Southern, and Arctic.
The Arctic Ocean.
Antarctica
Indian Ocean ect
Pacific ocean
the temperature of the water in the upper layers of the ocean