Both the Atlantic and Pacific Oceans are major divisions of the World Ocean on planet Earth.
Bounded by:
Key Marginal Seas: Caribbean Sea, Gulf of Mexico, Mediterranean Sea, North Sea, Baltic Sea.
Bounded by:
Key Marginal Seas: South China Sea, Sea of Japan, Coral Sea, Tasman Sea, Bering Sea, Gulf of Alaska.
The Pacific is the largest and deepest ocean (~165 million km², avg depth 4,280 m). The Atlantic is the second largest (~106 million km², avg depth 3,646 m). Together they cover ~50% of Earth's surface.