The Bahamas is the only one of the three not located in the Pacific Ocean.
| Country | Ocean Basin | Region |
|---|---|---|
| Vanuatu | Pacific Ocean | Melanesia (Southwest Pacific) |
| Nauru | Pacific Ocean | Micronesia (Central Pacific) |
| Bahamas | Atlantic Ocean | Lucayan Archipelago (West Atlantic) |
Ocean basin determines climate patterns, hurricane/cyclone exposure, marine biodiversity, EEZ claims, and geopolitical alignments. Vanuatu and Nauru are Pacific Islands Forum members; Bahamas is CARICOM (Caribbean Community).
All three are small island developing states (SIDS) facing climate existential threats—sea-level rise, storm intensification, ocean acidification—but in different ocean basins with different regional governance frameworks.