Observed from space, our planet’s surface appears to be dominated by the color blue. This blue color occurs because of the presence of the oceans and seas of the world. These features cover approximately 71% or 361 million square kilometers (139 million square miles) of Earth’s surface with a volume of about 1370 million cubic kilometers (329 million cubic miles). The average depth of these bodies of seawater is about 3.8 kilometers (2.4 miles). Maximum depths can exceed 10 kilometers (6.2 miles) in areas known as ocean trenches. The oceans contain 97% of our planet's available water. The ocean is also home to many forms of life uniquely adapted to survive in this habitat. Humans have degraded the oceans and their life through pollution, overfishing, carbon dioxide acidification and resource exploitation.
The Spinner dolphin (Stenella longirostris), a marine mammal in the family of oceanic dolphins, engages in formation of small schools. This cetacean species evinces a dominance...
Strait of MalaccaLast Updated on 2013-05-19 at 18:27
The Strait of Malacca, located between Indonesia, Malaysia, and Singapore, links the Indian Ocean to the South China Sea and Persian Gulf. The length of the strait is about 800... More »
Baltic SeaLast Updated on 2013-05-15 at 22:50
The Baltic Sea is situated between Scandinavia and mainland Europe, and extends into the North Sea. The sea is split into several smaller basins termed the Gulf of... More »
South China SeaLast Updated on 2013-05-14 at 17:00
The South China Sea is a critical world trade route and a potential source of... More »
White SeaLast Updated on 2013-05-14 at 14:25
The White Sea is a saline marine water body that is a southern inlet of the Barents Sea located off the northwest coast of Russia.Waters of the White Sea are rich in silicates... More »
Norwegian SeaLast Updated on 2013-05-14 at 14:24
The Norwegian Sea is a saline marginal sea, and an element of the North Atlantic Ocean, situated west of Norway. This sea is characterised by its cold deep basins that are... More »
Laptev SeaLast Updated on 2013-05-14 at 14:23
The Laptev Sea is a saline water body, lodged between the Kara Sea and East Siberian Sea. The chief land boundary of this marginal sea of the Arctic Ocean is the Siberian... More »