Australasia (2 countries)

1. Australia

2. New Zealand

Melanesia (4 countries)

3. Fiji

4. Papua New Guinea

5. Solomon Islands

6. Vanuatu

Micronesia (5 countries)

7. Federated States of Micronesia

8. Kiribati (partly in Polynesia as well)

9. Marshall Islands

10. Nauru

11. Palau

Polynesia (4 countries)

12. Samoa

13. Tonga

14. Tuvalu

15. New Zealand (geographically part of Polynesia as well; already listed)