There are five recognized oceans in the world. Here's a detailed list of each one:

1. Pacific Ocean:

   • Area: Approximately 165.25 million square kilometers (63.8 million square miles).

   • Extends from the Arctic Ocean in the north to the Southern Ocean in the south.

   • Bordered by the continents of Asia and Australia to the west and the Americas to the east.

2. Atlantic Ocean:

   • Area: Approximately 106.46 million square kilometers (41.1 million square miles).

   • Extends from the Arctic Ocean in the north to the Southern Ocean in the south.

   • Bordered by the continents of North and South America to the west and Europe and Africa to the east.

3. Indian Ocean:

   • Area: Approximately 70.56 million square kilometers (27.2 million square miles).

   • Extends from the Southern Ocean in the south to the Asian and African coasts in the north.

   • Bordered by the continents of Africa, Asia, and Australia.

4. Southern Ocean:

   • Area: Approximately 20.33 million square kilometers (7.8 million square miles).

   • Encircles the continent of Antarctica.

   • Defined by the waters south of 60 degrees south latitude.

5. Arctic Ocean:

   • Area: Approximately 14.06 million square kilometers (5.4 million square miles).

   • Borders the northern coasts of North America, Europe, and Asia.

   • Connects to the Atlantic and Pacific Oceans through various straits and passages.

Each of these oceans has unique characteristics and plays a crucial role in the Earth's climate and ecosystem. They offer diverse marine life, stunning landscapes, and various maritime activities for exploration and enjoyment.