What are the 5 oceans of the world?


Staff member
Jun 3, 2020
The early Earth used to have one landmass and one waterbody. The water covers 71% of the planet and over time, the oceans have evolved from this single waterbody. The boundaries between these oceans have evolved over time for geological, geographical, historical, cultural, and scientific reasons.

Do you know how many oceans are there?
Historically, there are only four oceans, namely the Atlantic, Pacific, Indian, and Arctic. But most countries now recognize the Southern (Antarctic) as the fifth ocean.

Image Source: https://en.wikipedia.org/wiki/Ocean

The following is the list of the 5 oceans in the world:

1. Pacific Ocean
The Pacific Ocean is the largest waterbody on the planet covering more than 30% of the surface of the Earth. This amounts to almost half of the water on Earth. Pacific means peaceful in Latin. It covers a vast region from west coast border of the Americas to Australia and east Asia. The equator divides the Pacific Ocean into the North Pacific Ocean and the South Pacific Ocean. It has the deepest trenches among all the oceans with an average depth of 3800m.

2. Atlantic Ocean
The Atlantic Ocean is the second largest and the saltiest ocean in the world. Atlantic originated from the Greek god Atlas. It covers the region between the Americas, Europe, and Africa. The ocean floor is composed of mid-Atlantic ridge, which is a part of the longest mountain range in the world.

3. Indian Ocean
The Indian Ocean is the third largest ocean. It covers the region from India to East Africa, Australia, and the Southern Ocean. It has limited marine life due to higher water temperature. It is geologically youngest of the 5 oceans bounded by 4 tectonic plate boundaries.

4. Southern Ocean
International Hydrographic Organization recognized the Southern Ocean in 2000. It's the fourth largest ocean. It has severe climate and extreme environment making it the least understood and unexplored ocean. It borders Antarctica in its entirety.

5. Arctic Ocean
The Arctic Ocean is the smallest and shallowest ocean among all 5 oceans. It is also the coldest and least salty ocean. It has a wide variety of marine species but a fragile ecosystem due to frigid temperatures. Some oceanographers still call it the Arctic Sea.

Apart from the oceans, there are many seas on Earth.


About us

  • Geology Buzz is a Geology forum for Geologists and Earth Science community. Get Geology News, Jobs, Courses, Maps, Photos, and articles from students and professionals. The forum covers multiple fields of Earth Science like Geology, Geophysics, Geochemistry, Hydrology, Geography, Engineering Geology, Petrology, Mineralogy, Structural Geology, Paleontology, and Environmental Geology. We have a community of Geologists, Geophysicists, Mining Engineers, Gemologists, Petroleum Engineers, and many others. Join Now!

Quick Navigation

User Menu