ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Facts About Ocean

Updated on October 22, 2010

To define an ocean we can simply state that an ocean is a great of salted water. But this small definition does not explain the greatness of oceans that occupy the majority of earth’s surface. These oceans are huge and so deep that within it resides a whole different world which is far larger than the world we live on.

Many parts of this mysterious world are still unknown to man. From the outside ocean appears as a calm and cool surface of water that is constantly moving. Oceans have been used as a mean of travelling, fishing and a trade route between many countries for as long as man is living on this planet.

Total Area Occupied By Oceans On Earth

In total all the oceans on the earth constitute 71% of the earth’s surface. This means that they are spread over 40 million square miles or 362 million sq km the earth.

Map of the World Oceans
Map of the World Oceans

The Number Of Oceans On The Earth

In total there are four oceans on this planet. These oceans are: Pacific Ocean, Indian Ocean, Atlantic Ocean and Arctic Ocean.

The Pacific Ocean is the largest ocean amongst them all. It spreads almost 64 million square miles and surrounds mainly the Australian continent.

The term pacific means peaceful as the warm waters and the climate around the islands of this ocean is heavenly. But these calm waters can be rough at times.

The Indian Ocean surrounds the continents of Asia, Africa, Antarctica and Australia. This ocean connects the four continents and is the trade route between many countries of these continents. It spreads over 28 million square miles.

A satellite view of the Arctic Ocean.
A satellite view of the Arctic Ocean.
Deep Ocean
Deep Ocean

The Atlantic Ocean is perhaps the busiest ocean of them all. It connects the Americas, Africa and Europe. It is the trade route between the continents and is always full of cargo ships being carried around continent to continent. It spreads over 32 million square miles.

The Arctic Ocean is the smallest ocean of them all. Spreading over 5 million square miles this ocean is also the coldest ocean as it surrounds the arctic region which is the coldest on the earth. 

The Depth Of Oceans

Oceans are extremely deep. The average depth of oceans is 12,200 feet or 3720m. The deepest point on earth is Mariana Trench in the western pacific. It is 36,198 feet or 11033m deep. 

The Average Temperature Of Oceans

The temperature of oceans varies according to the distance with the latitude. It decreases as the water depth increases. On average the temperature of oceans is 3.8 degrees C or 39 degrees F.

The Different Zones Of Oceans

On the level of depth the ocean is divided into three zones. The first zone is the shallow water that surrounds the coast line on land.  It is the water around the continental ledges. The shallow zone lasts till the depth of the ocean reaches 600 feet at maximum.

The Shallow zone can be used by humans for swimming as the front part is not that deep. Large fishes do not reside in the shallow zone. Mostly small fishes, phytoplankton and small crustaceans reside here.

One of the most fearsome creatures of the ocean, Shark.
One of the most fearsome creatures of the ocean, Shark.
Annual Salinity Chart of Ocean waters.
Annual Salinity Chart of Ocean waters.

The shallow zone opens into the continental zone. In this zone the majority of the population of ocean resides. Sharks, some whales, echinoderms, mollusks, cnidarians, sponges and zooplanktons live in this zone.

The continental zone then opens into abyss which is the deepest part of the ocean. It can be 6000-18000 deep. Some parts of this abyss are still not explored by man.

These regions are dark cold and extremely dangerous. Not many animals with the exception of some whales, sharks and zooplanktons live in this zone.

The Ocean Waters

The ocean waters are saline and constantly moving. The salinity of water is at average 3% consisting of salts and minerals such as potassium, bromine, calcium and magnesium.

The water moves in currents in oceans just like in rivers. They carry warm water from the tropical regions and cold water from the north and the South Pole. That is why the average temperature of ocean water is 3-4 degrees C.

The water pulls up and down in the form tides twice a day every day. Tides are caused due to the gravitational pull of moon. Sun also plays its part in pulling the tides but majorly it is due to the pull of the moon. At the coast line the water may rise high causing waves. 


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)