What is the difference between Ocean and Sea? - ProProfs
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What is the difference between Ocean and Sea?

Asked by R. Barnes on Jul 25, 2019

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7 Answers

Yash Mathers

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Yash Mathers
Content Writer, Diploma in Literature, Austin,Texas

Answered on Oct 09, 2019

Ocean and Sea are the largest bodies of water know the landmass. As thought by geography, a sea is not as big as an ocean. As a matter of fact, an ocean is a combination of seawater bodies. Even the largest sea which is the Mediterranean Sea of about 1,144,800 square miles in total area is smaller than the largest ocean with is the Arctic ocean of about 5,427,000 square miles in total area.


In addition, oceans are usually lower in-depth than the sea, probably because the sea is closer to the land. The closer part of the sea to the land can also allow for the survival of some plants and animals, while only a few organisms can survive in the ocean. The pressure in the ocean is higher than that of the sea, and the ocean is very with the absence of any sunlight penetration. There exist only five oceans in the whole wide world, while there are actually dozens of sea bodies around the world.

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Tara Pele

I am Tara & working as a Technical Blogger.

Tara Pele
Technical Blogger, MCA from New York, New York

Answered on Oct 03, 2019

Sea and Ocean are two different large bodies of water. People often use them interchangeably, but they are not the same. However, all the seas and oceans are all connected into one large body of water. The Sea is a large body of saltwater that covers part of the earth. It is often between connected to an Ocean. Seas are usually around the land, and they are greatly made up of marine life. An Ocean is much larger than a Sea. It is also a large body of water that exists between continents.


There are five major Oceans in the World; these five different Oceans are The Pacific, Arctic, Antarctic, Atlantic, and the Indian Oceans. Oceans nave more depth and do not support a great variety of marine life like the Sea. There are also farther away from the land, which further reduces the possibility of aquatic life in an Ocean.

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I. Woods

I. Woods

Answered on Sep 16, 2019

Sea and Oceans are large bodies of water. Many people find it difficult to tell the difference between an Ocean and a Sea and they use the terms interchangeably. An Ocean is much larger than a Sea. It is a large continuous body of salt water that separates the continents. Oceans cover about 70% of the total earth surface. The 5 Oceans are all interconnected into a large body of water.


The Pacific Ocean is the largest Ocean in the world and the Arctic ocean is the smallest. Seas are smaller than oceans. It is a body of saltwater generally forming part of or connecting with Ocean or a larger sea. Seas are partially enclosed by land. There are over 50 Seas scattered all around the earth’s surface. The Mediterranean Sea is the largest Sea in the world. Hope you find this information helpful.

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C. Kenway

C. Kenway
Content Writer, Jacksonville

Answered on Sep 11, 2019

An awe-inspiring stretch of sea is an ocean, and in particular, each of the major oceans is seas that are divided geographically. The ocean is larger than the sea. Several small seas are generally amassed together to make an ocean. The five major oceans of the world include the Arctic, Antarctic, Pacific, Indian, and Atlantic oceans. The reason for lack of depth with seas and small bodies of water is that they are close to land in general.


In the matter of the presence of life, and sea beds are growing places for plants and animals in which they depend on light. The most massive sea in the world is the Mediterranean Sea, and it is one fourth the world's smallest ocean, the Arctic Ocean.

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I. Muller

I. Muller
Math Professor, North Carolina

Answered on Sep 03, 2019

The ocean is known to be a big body of water. This is a salty body of water that will occupy a lot of portion of the earth. The ocean is known to have depths that cannot be explored by people anymore. The sea is also a salty body of water but it is not as large or as deep as the ocean.


There are some people who say that there are some marine animals that can only be found in oceans and some can only be found in seas. For example, there are some marine animals that can only be available in certain depths of water. Since seas will not reach the same depths as oceans, then those marine animals can only be available in oceans.

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L. Bonadio

Its kind of my job to give answers

L. Bonadio
Teacher, MCA, PhD, Toledo

Answered on Aug 27, 2019

There are some people who may talk about oceans and seas like they are the same thing but they are different for each other. If you would study geography, you should realize that these two are different from each other. The sea is usually smaller than the ocean and you will see it in a place where the ocean and the land usually meets.


The ocean is also known to be bigger and deeper than the sea. There are more marine animals that can be found there. The ocean actually covers 3/4 of the earth’s surface. This can still be confusing to people until they study geography in detail.

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Paschal Pete

Paschal Pete

Answered on Jul 27, 2019

Even if an ocean and a sea are both large water bodies, they do have some significance between each other. Well, lets get to the bottom of this!(pun included).The only similarity the two have is that they are salt water bodies. In terms of definition, an Ocean is a vast body of Salt water that cover three-fourth of the earth's surface wheras a sea is a body of water mostly suurouned by land. Other differences are:


  • Compared to an Ocean, a Sea is smaller in size
  • Ocean beds are are almost impossible to reach
  • There are a number of seas but only five oceans in the world.

These are only but a few of the differences between an ocean and a sea

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