Australia (continent) of the continent of Australia, but of the separate, submerged continent of Zealandia. New Zealand and Australia are both part of the Oceanian sub-region known as Australasia, with New Guinea being in Melanesia. The term Oceania is often used to denote the region encompassing the Australian continent, Zealandia and various islands in the Pacific Ocean that are not included in the seven-continent model. Papua New Guinea, a country within the continent, is one of the most culturally and linguistically diverse countries in the world. It is also one of the most rural, as only 18 percent of its people live
Smallest organisms that lives between sand grains on the coast of India. Its maximum length is only 4 mm. The smallest sea urchin, "Echinocyamus scaber", has a test only 6 mm across. "Patiriella parvivipara" is the smallest starfish, at only 5 mm across. The smallest vertebrates (and smallest amphibians) known are "Paedophryne amauensis" frogs from Papua New Guinea, which range in length from , and average . Previously, the title of smallest vertebrate was held by members of the fish genus "Paedocypris" of Indonesia. The one of world's smallest fish based on the minimum size at maturity is "Paedocypris progenetica" from Indonesia,