The Pacific Ocean is the largest of the all the oceans.  The equator subdivides it into the North Pacific Ocean and South Pacific Ocean.  It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the America in the east.

Its area is about 165.25 million square kilometres. The hydrosphere covers about 46% of the Earth's water surface and about one-third of its total surface area, making it larger than all of the 
The Mariana Trench in the western North Pacific is the deepest point in the world which is  10,911 metres deep.

The Pacific Ocean is the only ocean which is almost totally bounded by subduction zones. Only the Antarctic and Australian coasts have no nearby subduction zones.

The quantity of small plastic fragments floating in the north-east Pacific Ocean has increased a hundredfold over the past 40 years.

Marine pollution is a generic term for the harmful entry into the ocean of chemicals or particles. The rivers then empty into the Ocean, and with it the many chemicals used as fertilizers in agriculture. The excess of oxygen depleting chemicals in the water leads to hypoxia and the creation of a dead zone.

Marine litter is human-created waste that has ended up floating in a lake, sea, ocean, or waterway. Oceanic debris tends to accumulate at the centre of gyres and coastlines, frequently washing aground where it is known as beach litter.

The Pacific Ocean served as the crash site of satellites, including Mars 96, Fobos-Grunt and Upper Atmospheric Research Satellite.

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