Oceania

British commonwealth: island-continent of 6 states (including Tasmania island) + 2 territories; additional Pacific Ocean island territories: Coral Sea Islands, Norfolk Island; Indian Ocean island territories: Christmas Island, Ashmore and Cartier Islands, Cocos Islands, Heard Island and Macdonald Islands; Antarctic Territory

Polynesian islands of New Zealand realm Māori culture (North Island, South Islands, +700 small islands), Tokelau, Cook Islands, Niue, Ross Dependency of Antarctica

Largest island of Melanesia: eastern half is an independent country and British commonwealth (western half forms Indonesia province); Meganesia (or Sahul Shelf) is the continental landmass of Australia, Tasmania, and New Guinea

Islands of New Guinea (aka Papua): Papua New Guinea (country in eastern half) and western half (Indonesia provinces); countries of Soloman Islands, Fiji, Vanuatu; New Caledonia (France territory), Norfolk Island (Australia territory)

Tropical marine climate, small islands: Palau, Micronesia (FSM), Marshall Islands, Kiribati, Nauru, Guam, Northern Mariana Islands (US territories)

Polynesian triangle: Hawaiian Islands (US), Easter Island (Chile), New Zealand at furthest points of Central and South Pacific; 3 countries of Samoa, Tonga, Tuvalu; thousands of islands including Cook Islands (New Zealand associate), Niue (New Zealand associate), Tokelau (New Zealand territory), American Samoa (US territory), French Polynesia (France), Wallis and Futuna (France)