Oceans -

: The smallest and shallowest, located around the North Pole. Layers of the Deep

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

: Bordered by Africa, Asia, and Australia, it is a key region for marine biodiversity. : The smallest and shallowest, located around the North Pole

: Surrounding Antarctica, it is the newest named ocean and known for its cold, harsh environment. : The smallest and shallowest

While often discussed as a single global system, geographers divide the ocean into five distinct basins based on size and location:

: The largest and deepest, covering more area than all Earth's landmasses combined.

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