| Aspect | Southern Ocean | Pacific Ocean |
|---|---|---|
| Location | Surrounds Antarctica (Southern Hemisphere) | Between Americas and Asia, Arctic to Southern Ocean |
| Size | ~20.3M km² (4th largest) | ~165.2M km² (largest) |
| Avg. Depth | ~3,000 m | ~4,000 m (deepest) |
| Climate | Colder, extreme winds, high waves, frequent storms | Varied: tropical to polar |
| Marine Life | Whales, seals, penguins, krill | Vast diversity: fish, seabirds, mammals, reefs |
| Human Importance | Research, some fishing | Major trade, food, resources, transport for billions |
Distinct in location, scale, depth, climate, ecology, and human use.