World Ocean
The World Ocean or Global Ocean ( colloquially the sea or the ocean ) is the interconnected system of the oceanic waters of the sea , and comprises the bulk of the hydrosphere , covering ( 70 . 8% ) of Earth's surface , with a total volume of roughly . 
<triplet> World Ocean <subj> ocean <obj> instance of <subj> hydrosphere <obj> part of <triplet> ocean <subj> World Ocean <obj> part of <subj> hydrosphere <obj> part of