The ocean is structured into vertical zones defined by depth and light penetration: Ocean habitat | National Geographic Kids
: The largest and deepest, covering more area than all Earth's landmasses combined. Oceans
While often discussed as a single global system, geographers divide the ocean into five distinct basins based on size and location: The ocean is structured into vertical zones defined
: The second largest, stretching between the Americas and Europe/Africa. Oceans
: Bordered by Africa, Asia, and Australia, it is a key region for marine biodiversity.