From Wikipedia

The Oceans Portal
A portal dedicated to oceans, seas, oceanography and related topics

Selected panorama

– Hover over image and scroll to middle for controls to see more selected panorama images –


Surface view of the Atlantic Ocean

The ocean (also the sea or the world ocean) is the body of salt water which covers approximately 71% of the surface of the Earth and contains 97% of Earth's water. Another definition is "any of the large bodies of water into which the great ocean is divided". Separate names are used to identify five different areas of the ocean: Pacific (the largest) Atlantic, Indian, Southern (Antarctic), and Arctic (the smallest). Seawater covers approximately 361,000,000 km2 (139,000,000 sq mi) of the planet. The ocean is the principal component of Earth's hydrosphere, and therefore integral to life on Earth. Acting as a huge heat reservoir, the ocean influences climate and weather patterns, the carbon cycle, and the water cycle. ( Full article...)

Waves in Pacifica, California

The sea, connected as the world ocean or simply the ocean, is the body of salty water that covers approximately 71 percent of the Earth's surface. The word sea is also used to denote second-order sections of the sea, such as the Mediterranean Sea, as well as certain large, entirely landlocked, saltwater lakes, such as the Caspian Sea. ( Full article...)

Oceanography (from the Ancient Greek ὠκεανός " ocean" and γράφω " write"), also known as oceanology, is the scientific study of the ocean. It is an important Earth science, which covers a wide range of topics, including ecosystem dynamics; ocean currents, waves, and geophysical fluid dynamics; plate tectonics and the geology of the sea floor; and fluxes of various chemical substances and physical properties within the ocean and across its boundaries. These diverse topics reflect multiple disciplines that oceanographers utilize to glean further knowledge of the world ocean, including astronomy, biology, chemistry, climatology, geography, geology, hydrology, meteorology and physics. Paleoceanography studies the history of the oceans in the geologic past. An oceanographer is a person who studies many matters concerned with oceans including marine geology, physics, chemistry and biology. ( Full article...)

Selected article - show another

Satellite image of the Caribbean Sea

The Caribbean Sea ( Spanish: Mar Caribe; French: Mer des Caraïbes; Haitian Creole: Lamè Karayib; Jamaican Patois: Kiaribiyan Sii; Dutch: Caraïbische Zee; Papiamento: Laman Karibe) is an American mediterranean sea of the Atlantic Ocean in the tropics of the Western Hemisphere. It is bounded by Mexico and Central America to the west and south west, to the north by the Greater Antilles starting with Cuba, to the east by the Lesser Antilles, and to the south by the north coast of South America.

The entire area of the Caribbean Sea, the numerous islands of the West Indies, and adjacent coasts, are collectively known as the Caribbean. The Caribbean Sea is one of the largest seas and has an area of about 2,754,000 km2 (1,063,000 sq mi). The sea's deepest point is the Cayman Trough, between the Cayman Islands and Jamaica, at 7,686 m (25,217 ft) below sea level. The Caribbean coastline has many gulfs and bays: the Gulf of Gonâve, Gulf of Venezuela, Gulf of Darién, Golfo de los Mosquitos, Gulf of Paria and Gulf of Honduras. ( Full article...)
List of selected articles

Interesting facts - show different entries

Selected list articles and Marine habitat topics


Here are some tasks awaiting attention:

General images - show new batch

The following are images from various ocean-related articles on Wikipedia.

Related portals

In the news

16 September 2021 –
Nine swimmers drown in the Mediterranean Sea off Southern France when the water turns choppy in high winds, and five are rescued. (BBC)
14 September 2021 – Aftermath of the assassination of Jovenel Moïse
Prosecutor Bed-Ford Claude asks a judge to forbid prime minister Ariel Henry from leaving Haiti "by air, sea or road" due to "serious presumption relative to the assassination of the former president". (Reuters)
11 September 2021 – China–Vietnam relations
Chinese Foreign Minister Wang Yi tells Vietnamese Deputy Prime Minister Phạm Bình Minh that both countries should refrain from unilateral actions regarding the South China Sea disputes that could complicate the situation and magnify the dispute. (Al Jazeera)
21 August 2021 –
The world's highest elevation expressway, between Lhasa and Nagqu in Tibet, China, opens. The average elevation of the 295 kilometres (183 mi) expressway is more than 4,500 metres (14,800 ft) above sea level. (China Daily)
14 August 2021 –
Eleven people are killed by the waves in the sea area off Zhangzhou, Fujian, China. (China Daily)



More topics


Category puzzle
Select [►] to view subcategories Oceans



Admiralty law

Need assistance?

Need assistance?

Do you have a question about oceans, seas or oceanography that you can't find the answer to? Consider asking it at the Wikipedia reference desk.

Associated Wikimedia

The following Wikimedia Foundation sister projects provide more on this subject:






Learning resources



External media

External media


Purge server cache