Portal:Oceans

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 –

A view of the Southern Ocean from Great Ocean Road, Port Campbell, Princetown, Victoria, Australia
A panorama of Zanzibar, Tanzania, particularly the Stone Town, taken from the Indian Ocean
A view of Filfla and the Mediterranean Sea. Filfla is a small, mostly barren, uninhabited islet 4.5 kilometres (2.8 miles) south of Malta.
Icebergs broken off from glaciers in northern Baffin Bay, Cape York, Greenland
Caesio teres in the South Pacific Ocean in Fiji
A sea anemone in the Pacific Ocean, Baja California, Mexico
A mother sperm whale and her calf in the Indian Ocean off the coast of Mauritius
Satellite view of the Pacific Ocean and the main windward Hawaiian Islands
A view of the South China Sea, Bacuit Archipelago, municipality of El Nido, Palawan, Philippines
Orca (Orcinus orca) hunting a Weddell seal in the Southern Ocean
A view of Myrtos Beach and the Ionian Sea, Cephalonia, Ionian Islands, Greece
Clouds over the Southern Ocean, with continent labels
A surfer in the Pacific Ocean at the 2010 Mavericks competition, village of Princeton-by-the-Sea, northern California

Introduction

The ocean is the body of salt water that covers approximately 70.8% of Earth. The ocean is conventionally divided into large bodies of water, which are also referred to as oceans (in descending order: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Antarctic/Southern Ocean, and the Arctic Ocean), and are themselves mostly divided into seas, gulfs and subsequent bodies of water. The ocean contains 97% of Earth's water and is the primary component of Earth's hydrosphere, acting as a huge reservoir of heat for Earth's energy budget, as well as for its carbon cycle and water cycle, forming the basis for climate and weather patterns worldwide. The ocean is essential to life on Earth, harbouring most of Earth's animals and protist life, originating photosynthesis and therefore Earth's atmospheric oxygen, still supplying half of it. (Full article...)

A sea is a large body of salt water. There are particular seas and the sea. The sea commonly refers to the ocean, the interconnected body of seawaters that spans most of Earth. Particular seas are either marginal seas, second-order sections of the oceanic sea (e.g. the Mediterranean Sea), or certain large, nearly landlocked bodies of water. (Full article...)

Oceanography (from Ancient Greek ὠκεανός (ōkeanós) 'ocean' and γραφή (graphḗ) 'writing'), also known as oceanology, sea science, ocean science, and marine science, is the scientific study of the ocean, including its physics, chemistry, biology, and geology. (Full article...)

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Selected article -

Human activities have substantial impact on coral reefs, contributing to their worldwide decline. Damaging activities encompass coral mining, pollution (both organic and non-organic), overfishing, blast fishing, as well as the excavation of canals and access points to islands and bays. Additional threats comprise disease, destructive fishing practices, and the warming of oceans. Furthermore, the ocean's function as a carbon dioxide sink, alterations in the atmosphere, ultraviolet light, ocean acidification, viral infections, the repercussions of dust storms transporting agents to distant reefs, pollutants, and algal blooms represent some of the factors exerting influence on coral reefs. Importantly, the jeopardy faced by coral reefs extends far beyond coastal regions. The ramifications of climate change, notably global warming, induce an elevation in ocean temperatures that triggers coral bleaching—a potentially lethal phenomenon for coral ecosystems.

Scientists estimate that over next 20 years, about 70 to 90% of all coral reefs will disappear. With primary causes being warming ocean waters, ocean acidity, and pollution. In 2008, a worldwide study estimated that 19% of the existing area of coral reefs had already been lost. Only 46% of the world's reefs could be currently regarded as in good health and about 60% of the world's reefs may be at risk due to destructive, human-related activities. The threat to the health of reefs is particularly strong in Southeast Asia, where 80% of reefs are endangered. By the 2030s, 90% of reefs are expected to be at risk from both human activities and climate change; by 2050, it is predicted that all coral reefs will be in danger. (Full article...)

List of selected articles

Interesting facts -

The NOAAS Pisces (R 226) oceanographic research vessel (pictured) was named by five seventh graders from Southaven, Mississippi.
The Top 10 New Species of 2014 included a protist that acts like a sponge.
In 2018, an asteroid measuring 12 meters (39 feet) across exploded in an air burst over the Bering Sea near the Kamchatka Peninsula with the force of 173 kilotons of TNT.

Selected list articles and Marine habitat topics

Tasks

edit tasks

Here are some tasks awaiting attention:

Article requests : List of oceanographers, create a comprehensive article on Concentrations of marine debris out of all the gyre and "garbage patch" articles
Copyedit : Draft:Terrance (octopus)
Expand : Coral Sea, Endeavour Strait, Greenland Sea, Solomon Sea
Photo : find images for Category:Wikipedia requested photographs in the oceans
Stubs : Oceanography stub articles, Marine geography stub articles, Aleutian Trench, Bellingshausen Sea, Caernarfon Bay, Gerlache Strait, Gulf of Oman, Iceland Sea, Draft:Terrance (octopus)
Update : Botany Bay, Wilkins Sound, Mariana Trench, Challenger Deep
Verify : Antarctic Circumpolar Current, Bering Sea, Gulf of Aden, Iceberg B-15, Ionian Sea, Japan Trench, Moreton Bay, Sound (geography), Timor Sea
Other : add ISBNs and remove excessive or inappropriate external links from Aral Sea; check La Belle (ship) for GA status; improve citations or footnotes and remove excessive or inappropriate external links from MS Estonia

General images -

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

Image 1The Arctic Ocean, with borders as delineated by the International Hydrographic Organization (IHO), including Hudson Bay (some of which is south of 57°N latitude, off the map) and all other marginal seas. (from Arctic Ocean)
Image 2Typhoon Tip at global peak intensity on 12 October 1979 (from Pacific Ocean)
Image 3The Aethiopian Ocean depicted in a 1710 French map of Africa (from Atlantic Ocean)
Image 4Fish of the Notothenioidei suborder, such as this young icefish, are mostly restricted to the Antarctic and Subantarctic. (from Southern Ocean)
Image 5Mount St. Helens in Skamania County, Washington, U.S. in 2020 (from Pacific Ocean)
Image 6The Andaman Negritos are thought to be the first inhabitants of the Andaman Islands, having emigrated from the mainland tens of thousands of years ago. (from Indian Ocean)
Image 7The British invasion of Isle de France on 29 November 1810 during the Napoleonic Wars (from Indian Ocean)
Image 8The Austronesian maritime trade network was the first trade routes in the Indian Ocean. (from Indian Ocean)
Image 9The island geography of the Pacific Ocean Basin (from Pacific Ocean)
Image 10A bathymetric/topographic map of the Arctic Ocean and the surrounding lands. (from Arctic Ocean)
Image 11Iceberg A22A in the South Atlantic Ocean (from Atlantic Ocean)
Image 12Distribution of the major water mass in the Arctic Ocean. The section sketches the different water masses along a vertical section from Bering Strait over the geographic North Pole to Fram Strait. As the stratification is stable, deeper water masses are denser than the layers above. (from Arctic Ocean)
Image 13Antarctic krill (Euphausia superba) are a keystone species of the food web. (from Southern Ocean)
Image 14Universalis Cosmographia, also known as the Waldseemüller map, dated 1507, was the first map to show the Americas separating two distinct oceans. South America was generally considered the New World and shows the name "America" for the first time, after Amerigo Vespucci (from Pacific Ocean)
Image 15An adult and sub-adult Minke whale are dragged aboard the Japanese whaling vessel Nisshin Maru. (from Southern Ocean)
Image 16The 1564 Typus Orbis Terrarum, a map by Abraham Ortelius, showed the imagined link between the proposed continent of Antarctica and South America. (from Southern Ocean)
Image 17MS Explorer in Antarctica in January 1999. She sank on 23 November 2007 after hitting an iceberg. (from Southern Ocean)
Image 18A map of Australia's official interpretation of the names and limits of oceans and seas around Australia (from Southern Ocean)
Image 19"Terres Australes" [sic] label without any charted landmass (from Southern Ocean)
Image 20Admiral von Bellingshausen (from Southern Ocean)
Image 21The International Hydrographic Organization's delineation of the "Southern Ocean" has moved steadily southward since the original 1928 edition of its Limits of Oceans and Seas. (from Southern Ocean)
Image 22Frank Hurley: As time wore on it became more and more evident that the ship was doomed (Endurance trapped in pack ice), National Library of Australia. (from Southern Ocean)
Image 23Map showing the migration of the Austronesian peoples (from Pacific Ocean)
Image 24Maris Pacifici by Ortelius (1589). One of the first printed maps to show the Pacific Ocean (from Pacific Ocean)
Image 25Model of a Fijian drua, an example of an Austronesian vessel with a double-canoe (catamaran) hull and a crab claw sail (from Pacific Ocean)
Image 26Air pollution in South Asia spread over the Bay of Bengal and beyond. (from Indian Ocean)
Image 271928 delineation (from Southern Ocean)
Image 28Tarawa Atoll in Kiribati (from Pacific Ocean)
Image 29An exclusive economic zone (EEZ) map of the Pacific (from Pacific Ocean)
Image 30Map of the Pacific Ocean during European Exploration, circa 1754. (from Pacific Ocean)
Image 31Sea cover in the Arctic Ocean, showing the median, 2005 and 2007 coverage (from Arctic Ocean)
Image 32In the subpolar gyre of the North Atlantic warm subtropical waters are transformed into colder subpolar and polar waters. In the Labrador Sea this water flows back to the subtropical gyre. (from Atlantic Ocean)
Image 33A wandering albatross (Diomedea exulans) on South Georgia (from Southern Ocean)
Image 34A female warty squid (Moroteuthis ingens) (from Southern Ocean)
Image 35Malé's population has increased from 20,000 people in 1987 to more than 220,000 people in 2020. (from Indian Ocean)
Image 36Weddell seals (Leptonychotes weddellii) are the most southerly of Antarctic mammals. (from Southern Ocean)
Image 37Thule archaeological site (from Arctic Ocean)
Image 38Three polar bears approach USS Honolulu near the North Pole. (from Arctic Ocean)
Image 39A copepod (from Arctic Ocean)
Image 40Madagascar's elephant bird, Mauritius's dodo bird and ostrich (from left to right) (from Indian Ocean)
Image 41Banks of the northwest Atlantic (from Atlantic Ocean)
Image 42Seas that are parts of the Southern Ocean (from Southern Ocean)
Image 431937 delineation (from Southern Ocean)
Image 44Manganese nodule (from Southern Ocean)
Image 45Made in 1529, the Diogo Ribeiro map was the first to show the Pacific at about its proper size (from Pacific Ocean)
Image 46In 2020, Japanese Prime Minister Suga declined to drink the bottle of Fukushima's treated radioactive water that he was holding, which would otherwise be discharged to the Pacific. (from Pacific Ocean)
Image 47Famous official portrait of Captain James Cook who proved that waters encompassed the southern latitudes of the globe. "He holds his own chart of the Southern Ocean on the table and his right hand points to the east coast of Australia on it." (from Southern Ocean)
Image 48A Chagossian on Diego Garcia in 1971, before the British expelled the islanders. He spoke a French-based creole language and his ancestors were likely brought as slaves in the 19th century. (from Indian Ocean)
Image 49Area inside the black line indicates the area constituting the Pacific Ocean prior to 2002; darker blue areas are its informal current borders following the recreation of the Southern Ocean and the reinclusion of marginal seas. (from Southern Ocean)
Image 50On the sea ice of the Arctic Ocean temporary logistic stations may be installed, Here, a Twin Otter is refueled on the pack ice at 86°N, 76°43‘W. (from Arctic Ocean)
Image 51Major ocean trade routes in the world include the northern Indian Ocean. (from Indian Ocean)
Image 52Density structure of the upper 1,200 m (3,900 ft) in the Arctic Ocean. Profiles of temperature and salinity for the Amundsen Basin, the Canadian Basin and the Greenland Sea are sketched. (from Arctic Ocean)
Image 53Minke whale (from Arctic Ocean)
Image 54An iceberg being pushed out of a shipping lane by (L to R) USS Burton Island, USS Atka, and USS Glacier near McMurdo Station, Antarctica, 1965 (from Southern Ocean)
Image 55James Weddell's second expedition in 1823, depicting the brig Jane and the cutter Beaufroy (from Southern Ocean)
Image 56A stratovolcano in Ulawun on the island of New Britain in Papua New Guinea (from Pacific Ocean)
Image 57A Ring of Fire; the Pacific is ringed by many volcanoes and oceanic trenches. This map does not show the Cascadia subduction zone along part of the west coast of North America, whose trench is completely buried in sediments. (from Pacific Ocean)
Image 58Path of the thermohaline circulation. Purple paths represent deep-water currents, while blue paths represent surface currents.
Image 59False color map of ocean depth in the Atlantic basin (from Atlantic Ocean)
Image 60Banks of the northeast Atlantic (from Atlantic Ocean)
Image 61Mombasa Port on Kenya's Indian Ocean coast (from Indian Ocean)
Image 62Greco-Roman trade with ancient India according to the Periplus of the Erythraean Sea 1st century CE (from Indian Ocean)
Image 63Abel Aubert du Petit-Thouars taking over Tahiti on 9 September 1842 (from Pacific Ocean)
Image 64Map of the Pacific Ocean during European Exploration, circa 1702–1707 (from Pacific Ocean)
Image 65The Kennedy Channel. (from Arctic Ocean)
Image 66Impact of El Niño and La Niña on North America (from Pacific Ocean)
Image 67During summer, warm continental masses draw moist air from the Indian Ocean hence producing heavy rainfall. The process is reversed during winter, resulting in dry conditions. (from Indian Ocean)
Image 68Coral reefs of the Maldives (from Indian Ocean)
Image 69The Antarctic Ocean, as delineated by the draft 4th edition of the International Hydrographic Organization's Limits of Oceans and Seas (2002) (from Southern Ocean)
Image 70Capture of Atlantic northwest cod in million tons (from Atlantic Ocean)
Image 71Severe cracks in an ice pier in use for four seasons at McMurdo Station slowed cargo operations in 1983 and proved a safety hazard. (from Southern Ocean)
Image 72Pacific Ocean currents have created three islands of debris. (from Pacific Ocean)
Image 73According to the Coastal hypothesis, modern humans spread from Africa along the northern rim of the Indian Ocean. (from Indian Ocean)
Image 74Sunset over the Pacific Ocean as seen from the International Space Station. Tops of thunderclouds are also visible. (from Pacific Ocean)
Image 751911 South Polar Regions exploration map (from Southern Ocean)
Image 76Orca (Orcinus orca) hunting a Weddell seal in the Southern Ocean (from Southern Ocean)
Image 77The Arctic region showing the Northeast Passage, the Northern Sea Route within it, and the Northwest Passage via Canadian Inland Waters. (from Arctic Ocean)
Image 78
Upwelling in the Southern Ocean
(from Southern Ocean)
Image 79Location of the Southern Ocean gyres (from Southern Ocean)
Image 80A general delineation of the Antarctic Convergence, sometimes used by scientists as the demarcation of the Southern Ocean (from Southern Ocean)
Image 81"Southern Ocean" as alternative to the Aethiopian Ocean, 18th century (from Southern Ocean)
Image 82The Arctic region; of note, the region's southerly border on this map is depicted by a red isotherm, with all territory to the north having an average temperature of less than 10 °C (50 °F) in July. (from Arctic Ocean)
Image 83Portrait of Edmund Halley by Godfrey Kneller (before 1721) (from Southern Ocean)
Image 84Waves in the trade winds in the Atlantic Ocean – areas of converging winds that move along the same track as the prevailing wind – create instabilities in the atmosphere that may lead to the formation of hurricanes.
Image 85Cod fishery in Norway (from Atlantic Ocean)
Image 86Marine debris on a Hawaiian coast in 2008 (from Pacific Ocean)
Image 87The Antarctic Circumpolar Current (ACC) is the strongest current system in the world oceans, linking the Atlantic, Indian and Pacific basins. (from Southern Ocean)
Image 88Walruses on Arctic ice floe (from Arctic Ocean)
Image 89Based on the medieval Íslendingasögur sagas, including the Grœnlendinga saga, this interpretative map of the "Norse World" shows that Norse knowledge of the Americas and the Atlantic remained limited. (from Atlantic Ocean)
Image 90Regional Working Group zones for SOOS (from Southern Ocean)
Image 91The economically important Silk Road was blocked from Europe by the Ottoman Empire in c. 1453 with the fall of the Byzantine Empire. This spurred exploration, and a new sea route around Africa was found, triggering the Age of Discovery. (from Indian Ocean)
Image 92Sunset in Monterey County, California, U.S. (from Pacific Ocean)
Image 93Agulhas Bank (from Atlantic Ocean)
Image 94The bathyscaphe Trieste before her record dive to the bottom of the Mariana Trench, 23 January 1960 (from Pacific Ocean)
Image 95For most of the 16th century, the Portuguese dominated the Indian Ocean trade. (from Indian Ocean)
Image 96Marine debris strewn over the beaches of the South Atlantic Inaccessible Island (from Atlantic Ocean)
Image 97Aldabra giant tortoise from the islands of the Aldabra Atoll in the Seychelles (from Indian Ocean)
Image 98Emanuel Bowen's 1780s map of the Arctic features a "Northern Ocean". (from Arctic Ocean)
Image 99Embarked and disembarked slaves in the Atlantic slave trade 1525–1863 (first and last slave voyages) (from Atlantic Ocean)
Image 100Bahama Banks (from Atlantic Ocean)
Image 101USS Vincennes at Disappointment Bay, Antarctica in early 1840 (from Southern Ocean)
Image 102Excavation of the Ertebølle middens in 1880 (from Atlantic Ocean)
Image 103Continents and islands of the Southern Ocean (from Southern Ocean)
Image 104As the Gulf Stream meanders across the North Atlantic from the North American east coast to Western Europe its temperature drops by 20 °C (36 °F).
Image 105The three major cultural areas of the Pacific Ocean islands: Micronesia, Melanesia and Polynesia (from Pacific Ocean)
Image 106The Atlantic Gyres influenced the Portuguese discoveries and trading port routes, here shown in the India Run ("Carreira da Índia"), which would be developed in subsequent years. (from Atlantic Ocean)

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In the news

17 December 2025 – War on drugs, Operation Southern Spear: The United States Southern Command says the U.S. Navy attacked an alleged drug smuggling boat in the Eastern Pacific, killing at least four people. (AP)
15 December 2025 – War on drugs, Operation Southern Spear: The United States Southern Command says the U.S. Navy has carried out airstrikes on three alleged drug smuggling vessels in international waters of the Eastern Pacific, killing at least eight people. (Reuters)
9 December 2025 –: A Sudanese Air Force Ilyushin Il-76 aircraft crashes while landing at an air base in Port Sudan, Red Sea State, Sudan, killing all crew members. (Al Jazeera)
7 December 2025 – 2025 North Indian Ocean cyclone season: Cyclone Ditwah; The death toll from the floods and landslides caused by heavy rains in Sri Lanka increases to 618. (Al Jazeera)

WikiProjects

WikiProject Oceans
WikiProject Limnology and Oceanography
WikiProject Marine life
WikiProject Cetaceans
WikiProject Fishes
WikiProject Sharks

Related WikiProjects

WikiProject Arthropods
WikiProject Fisheries and Fishing
WikiProject Lakes
WikiProject Rivers

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Admiralty law

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External media

World Ocean Database and World Ocean Atlas Series – from the U.S. National Centers for Environmental Information, National Oceanic and Atmospheric Administration. Includes the World Ocean Atlas.
European Atlas of the Seas – the European Atlas of the Seas, from the European Commission
NOAA Research – NOAA research news, Oceanic and Atmospheric Research (OAR)
Ocean Research – from The World Ocean Observatory
Ocean Biodiversity Information System – "a global open-access data and information clearing-house on marine biodiversity for science, conservation and sustainable development"

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Earth's oceans and seas
Antarctic/Southern Ocean	Amundsen Sea Bellingshausen Sea Cooperation Sea Cosmonauts Sea Davis Sea D'Urville Sea King Haakon VII Sea Lazarev Sea Mawson Sea Riiser-Larsen Sea Ross Sea Scotia Sea Somov Sea Weddell Sea
Arctic Ocean	Amundsen Gulf Barents Sea Beaufort Sea Chukchi Sea East Siberian Sea Greenland Sea Gulf of Boothia Kara Sea Laptev Sea Lincoln Sea Pechora Sea Prince Gustaf Adolf Sea Queen Victoria Sea Wandel Sea White Sea
Atlantic Ocean	Adriatic Sea Aegean Sea Alboran Sea American Mediterranean Sea Archipelago Sea Argentine Sea Baffin Bay Balearic Sea Baltic Sea Bay of Biscay Bay of Bothnia Bay of Campeche Bay of Fundy Black Sea Bothnian Sea Caribbean Sea Celtic Sea English Channel Foxe Basin Greenland Sea Gulf of Bothnia Gulf of Finland Gulf of Guinea Gulf of Lion Gulf of Maine Gulf of Mexico Gulf of Sidra Gulf of St. Lawrence Gulf of Venezuela Hudson Bay Ionian Sea Irish Sea Irminger Sea James Bay Labrador Sea Levantine Sea Libyan Sea Ligurian Sea Mediterranean Sea Myrtoan Sea North Sea Norwegian Sea Sargasso Sea Sea of Åland Sea of Azov Sea of Crete Sea of the Hebrides Sea of Marmara Thracian Sea Tyrrhenian Sea Wadden Sea
Indian Ocean	Andaman Sea Arabian Sea Bay of Bengal Flores Sea Great Australian Bight Gulf of Aden Gulf of Aqaba Gulf of Khambhat Gulf of Kutch Gulf of Oman Gulf of Suez Laccadive Sea Mozambique Channel Persian Gulf Red Sea Timor Sea
Pacific Ocean	Arafura Sea Bali Sea Banda Sea Bering Sea Bismarck Sea Bohai Sea Bohol Sea Camotes Sea Celebes Sea Chilean Sea Coral Sea East China Sea Gulf of Alaska Gulf of Anadyr Gulf of California Gulf of Carpentaria Gulf of Fonseca Gulf of Panama Gulf of Thailand Gulf of Tonkin Halmahera Sea Java Sea Koro Sea Mar de Grau Molucca Sea Moro Gulf Philippine Sea Salish Sea Savu Sea Sea of Japan Sea of Okhotsk Seram Sea Seto Inland Sea Shantar Sea Sibuyan Sea Solomon Sea South China Sea Sulu Sea Tasman Sea Visayan Sea West Philippine Sea Yellow Sea
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Others	Ancient oceans Ocean Sea Superocean
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