Name Area Avg. Depth sq. mi.ft. Pacific Ocean60,060,70013,215 Atlantic Ocean29,637,90012,880 Indian Ocean26,469,50013,002 Southern Ocean7,848,30013,100 Arctic Ocean5,427,0003,953 Greatest Known Depth ft.Name of Region 36,198Mariana Trench 30,246Puerto Rico Trench 24,460Sunda Trench 23,736South Sandwich Trench 18,456N/A

The Pacific Ocean is derived from the Latin name Mare Pacificum, "peaceful sea.” Marine pollution’s biggest sources are rivers that empty into the Ocean. These chemicals deplete the water of its oxygen which leads to hypoxia and the creation of a dead zone. It is the largest body of water on Earth– at an area of million Km squared. This ocean covers about 32% of the Earth's surface and is larger than all of the Earth's land area combined The rivers bring with them the many chemicals used as fertilizers in agriculture as well as waste from livestock and humans.

The ocean's name, derived from Greek mythology, means the “Sea of Atlas." It is the saltiest of the world's major oceans; the salinity of the surface waters in the open ocean ranges from 33 to 37 parts per thousand ( %) Endangered marine species include the manatee, and sea lions. The Atlantic Ocean is the second- largest ocean, covering about 1/5 of the Earth's surface.

The Indian Ocean is the third largest body of water in the world, covering about 20% of the Earth's water surface. The climate north of the equator is affected by a monsoon wind system causing rainy seasons that last for months at a time. The Indian Ocean was the sight of the underwater earthquake that caused the devastating Asian Tsunami of 2004.

It is the world’s fourth largest ocean and the latest to be defined. It encircles Antarctica, and its northernmost boundary is defined as the 60° S latitiude. May be the site of large oil and gas fields near the ocean and continental margin. It was voted and accepted as a new ocean by the International Hydrographic Organization (IHO) in 2000, though it has been called the Southern Ocean by mariners for years.

It is the smallest of the world's five oceans and the shallowest. Its salinity is the lowest on average of the five major oceans, due to low evaporation, as well as limited outflow to surrounding waters Endangered marine species include walruses. The area has a fragile ecosystem which is slow to change and slow to recover from disruptions or damage The Arctic Ocean occupies a roughly circular basin and covers an area of about 14,056,000 square km. slightly less than 1.5 times the size of the U.S.