The Arabian Sea (northwestern Indian Ocean) is bounded by 12 countries across three coasts:
Correction: The Arabian Sea's western boundary is the Horn of Africa & Arabian Peninsula.
| Coast | Countries |
|---|---|
| West (Africa) | Somalia, Djibouti |
| North (Arabian Peninsula) | Yemen, Oman |
| Northeast (Iran/Pakistan) | Iran, Pakistan |
| East (South Asia) | India, Maldives, Sri Lanka |
Note: The source included Sudan, Egypt, UAE—these border the Red Sea / Persian Gulf, not the Arabian Sea directly. The Gulf of Aden (west) connects to Red Sea; Gulf of Oman (north) connects to Persian Gulf. The Arabian Sea proper is bounded as above.
Major shipping lanes (Suez–Malacca), oil/gas exports (Gulf), fisheries, monsoon-driven productivity, piracy history (Somalia).