澳大利亚 Australia纽西兰(包括库克群岛) New Zealand巴布亚新几内亚 The Independent State of Papua New Guinea斐济 Fiji密克罗尼西亚 Micronesia瑙鲁 Nauru萨摩亚 Samoa汤加 The Kingdom of Tonga瓦努阿图 Vanuatu马绍尔群岛 Marshall Islands帕劳 Palau 所罗门群岛 Solomon Islands 基里巴斯 Kiribati图瓦卢 Tuvalu大洋洲和亚洲以印度尼西亚的巴布亚地区为界。包括了印度尼西亚的巴布亚地区、巴布亚新畿内亚、澳大利亚、新西兰及南太平洋的岛国。巴布亚新畿内亚是唯一一个与别国有陆地疆界的大洋洲国家,与亚洲国家印度尼西亚接壤。Oceania (sometimes Oceanica[1]) is a geographical, often geopolitical, region consisting of numerous lands—mostly islands in the Pacific Ocean and vicinity. The term is often used in many languages to define one of the continents[2][3][4] and is one of eight terrestrial ecozones.Ethnologically, the islands that are included in Oceania are divided into the subregions of Melanesia, Micronesia, and Polynesia.[5]The exact scope of Oceania is variably defined: it generally includes New Zealand, is often taken to include parts of Australasia such as Australia and New Guinea, and sometimes all or part of the Malay Archipelago.[Originally coined by the French explorer Dumont d'Urville in 1831, Oceania has been traditionally divided into Micronesia, Melanesia and Polynesia. As with any region, however, interpretations vary; increasingly, geographers and scientists divide Oceania into Near Oceania and Remote Oceania.[9]Most of Oceania consists of island nations composed of thousands of coral atolls and volcanic islands, with small human populations.Australia is the only continental country but Indonesia has land borders with Papua New Guinea, East Timor, and Malaysia. If the Australia-New Guinea continent is included then the highest point is Puncak Jaya in Papua at 4,884 m (16,024 ft) and the lowest point is Lake Eyre, Australia at 16 m (52 ft) below sea level.