Portal:Oceans
The Oceans Portal
A portal dedicated to oceans, seas, oceanography and related topics
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Introduction
Earth's ocean |
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Main five oceans division: Further subdivision: Marginal seas |

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 (the Pacific, Atlantic, Indian, Antarctic/Southern, and 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...)
Selected article -
The Persian Gulf, sometimes called the Arabian Gulf, is a mediterranean sea in West Asia. The body of water is an extension of the Arabian Sea and the larger Indian Ocean located between Iran and the Arabian Peninsula. It is connected to the Gulf of Oman in the east by the Strait of Hormuz. The river delta of the Shatt al-Arab forms the northwest shoreline.
The Persian Gulf has many fishing grounds, extensive reefs (mostly rocky, but also coral), and abundant pearl oysters, however its ecology has been damaged by industrialization and oil spills. (Full article...)
Interesting facts -
- The sea snail Halystina umberlee (pictured) was named after the homonymous fictional evil goddess from the Forgotten Realms role-playing game setting.
- The Guanacaste Conservation Area, located in Northwest Costa Rica, is a 163,000-hectare (400,000-acre) expanse of protected land and sea.
- The pea crab Tunicotheres moseri lives inside the water-filled chamber of a sea squirt.
Selected list articles and Marine habitat topics
Marine habitats |
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Coastal habitats |
Ocean surface |
Open ocean |
Sea floor |
- List of oceans
- List of ancient oceans
- List of seas
- List of circumnavigations
- List of cruise lines
- List of largest lakes and seas in the Solar System
- List of marine biologists
- List of marine ecoregions
- List of maritime explorers
- List of naval battles
- List of ocean liners
- List of oceanographic institutions and programs
- List of oldest surviving ships
- List of rogue waves
- List of seafood dishes
- List of submarine topographical features
Tasks
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Related portals
In the news
- 18 April 2025 – Red Sea crisis
- US–UK airstrikes on Yemen
- March–April 2025 United States attacks in Yemen
- The Houthis say that American airstrikes targeted the Ras Isa port in Yemen, killing 74 people and wounding 171 others. This marks the single-deadliest known attack under President Donald Trump’s new campaign targeting the Houthis. (AP)
- 17 April 2025 – Red Sea crisis
- March–April 2025 United States attacks in Yemen
- The United States Navy launches a wave of missile strikes across Houthi-controlled Yemen, killing at least one person in Sanaa. (AP)
WikiProjects
Topics
Categories
Associated Wikimedia
The following Wikimedia Foundation sister projects provide more on this subject:
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Commons
Free media repository -
Wikibooks
Free textbooks and manuals -
Wikidata
Free knowledge base -
Wikinews
Free-content news -
Wikiquote
Collection of quotations -
Wikisource
Free-content library -
Wikiversity
Free learning tools -
Wiktionary
Dictionary and thesaurus
Admiralty law
Admiralty (maritime) law |
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History |
Features |
Contract of carriage / charterparty |
Parties |
Judiciaries |
International organizations |
International conventions |
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International Codes |
Need assistance?

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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"