Oceans

The ocean is structured into vertical zones defined by depth and light penetration: Ocean habitat | National Geographic Kids

: Bordered by Africa, Asia, and Australia, it is a key region for marine biodiversity. Oceans

: Surrounding Antarctica, it is the newest named ocean and known for its cold, harsh environment. The ocean is structured into vertical zones defined

: The second largest, stretching between the Americas and Europe/Africa. harsh environment. : The second largest