An ocean is an enormous area of salt water. It is situated between continents. The “ocean” is all of smaller oceans which join between each other. 72% surface of earth is ocean. Sometime ocean also called marine biomes.

The largest ocean and the deepest ocean is the Pacific Ocean. It covers about 1/3 of our planet. The smallest ocean is the Arctic Ocean.

The deepest point is the Mariana Trench which is about 11,000 metres deep. The main character of deep ocean is a very cold temperature, high pressure, complete darkness. As we have known some very unusual creatures live in this part of the ocean.

There are many different ocean temperatures in the open ocean. Water cools and warms more slowly than land does.