What’s the Difference Between a Sea and an Ocean?
Think “one big ocean with named neighborhoods.” All the water around Earth is a single, connected global ocean, and the Pacific, Atlantic, Indian, Southern, and Arctic are really just regions of it. Seas like the Mediterranean, Caribbean, or Red Sea are smaller, usually shallower pockets on the ocean’s edges, often partly wrapped by land - so every sea is part of the ocean, but not every part of the ocean is a sea.