Wanderlust World Wanderlust World The premise of "five minor oceans" reflects a terminological confusion. Modern oceanography recognizes five principal ocean basins—not "major" and "minor" categories. All five are major oceans by any meaningful metric.
| Ocean | Area (km²) | % Earth Surface | Avg Depth (m) | Volume (km³) |
|---|---|---|---|---|
| Pacific | 165,250,000 | 46% | 4,280 | 710,000,000 |
| Atlantic | 106,460,000 | 29% | 3,646 | 310,000,000 |
| Indian | 73,556,000 | 20% | 3,741 | 292,000,000 |
| Southern | 21,960,000 | 6% | 3,270 | 71,800,000 |
| Arctic | 15,558,000 | 4% | 1,205 | 18,750,000 |
What might be called "minor" are marginal seas—subdivisions of oceans: Mediterranean, Caribbean, South China, Bering, Okhotsk, etc. These are parts of ocean basins, not separate oceans.
Five ocean basins (or "five oceans"). No hierarchy of major/minor. The Arctic and Southern Oceans are smaller but not minor—they drive planetary systems disproportionate to their area.
Oceanography moved beyond "major/minor" decades ago. The five basins form one interconnected World Ocean—our planet's defining feature.