Sulawesi in the context of "Flores Sea"

Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian and Pacific oceans. Comprising over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guinea, Indonesia is the world's largest archipelagic state and the 14th-largest country by area, at 1,904,569 square kilometres (735,358 square miles). With over 280 million people, Indonesia is the world's fourth-most-populous country and the most populous Muslim-majority country. Java, the world's most populous island, is home to more than half of the country's population.

Indonesia operates as a presidential republic with an elected legislature and consists of 38 provinces, nine of which have special autonomous status. Jakarta, the largest city, is the world's second-most-populous urban area. Indonesia shares land borders with Papua New Guinea, Timor-Leste, and East Malaysia, as well as maritime borders with Singapore, Peninsular Malaysia, Vietnam, Thailand, the Philippines, Australia, Palau, and India. Despite its large population and densely populated regions, Indonesia has vast areas of wilderness that support one of the world's highest levels of biodiversity.

The Sundanese (Sundanese: ᮅᮛᮀ ᮞᮥᮔ᮪ᮓ, romanized: Urang Sunda; Indonesian: Orang Sunda) are an Austronesian ethnic group native to western part of Java island in Indonesia, with the term Tatar Pasundan (ᮒᮒᮁ ᮕᮞᮥᮔ᮪ᮓᮔ᮪) which covers most of the administrative areas of the provinces of West Java, Banten, and western part of Central Java. They number approximately 42 million and form Indonesia's second largest ethnic group, and the fourth largest in Southeast Asia. They speak the Sundanese language, which is part of the Austronesian languages.

Sundanese migrants can also be found in Lampung, South Sumatra, and, to a lesser extent, in Central Java and East Java.The Sundanese people can also be found on several other islands in Indonesia such as Sumatra, Kalimantan, Sulawesi, Bali and Papua.

Balinese (/ˈbɑːlɪniːz/ BAH-lih-neez; Basa Bali, Balinese script: ᬩᬲᬩᬮᬶ, IPA: [ˈbasə ˈbali]) is an Austronesian language spoken primarily by the Balinese people on the Indonesian island of Bali, as well as Nusa Penida, Western Lombok, and Eastern Java, and also spread to Southern Sumatra, and Sulawesi due to the transmigration program. Most Balinese speakers also use Indonesian. The 2000 national census recorded 3.3 million people speakers of Balinese with only 1 million people still using the Balinese language in their daily lives according to the Bali Cultural Agency estimated in 2011.

The higher registers of the language borrow extensively from Javanese: an old form of classical Javanese, Kawi, is used in Bali as a religious and ceremonial language, while most of Balinese speakers use the low register known as Kapara Balinese as their everyday language. Most speakers of Balinese also speak Indonesian for official and commercial purposes as well as a means to communicate with non-Balinese-speaking Indonesians.

The Balinese (Balinese: ᬳᬦᬓ᭄‌ᬩᬮᬶ, romanized: Anak Bali (in the ketah register), ᬯᭀᬂᬩᬮᬶ, Wong Bali (in the madia register), ᬓ᭄ᬭᬫᬩᬮᬶ, Krama Bali (in the singgih register); Indonesian: Orang Bali) are an Austronesian ethnic group native to the Indonesian island of Bali and the surrounding islands. The Balinese population of 4.2 million (1.7% of Indonesia's population) live mostly on the island of Bali, making up 85% of the island's population. The Balinese are distinctive amongst the ethnic groups of Indonesia for their adherence to Balinese Hinduism rather than Abrahamic religions such as Islam or Christianity.

There are also significant populations on the island of Lombok and in the easternmost regions of Java (e.g. the regency of Banyuwangi), most of them are descendants of Balinese since the kingdoms era who once controlled the region. Some Balinese can also be found in Balinese migrant areas such as Lampung and Sulawesi regions, mainly due to the migration following the eruption of Mount Agung in 1963 as well as the transmigration program enacted by the Indonesian government.

The Greater Sunda Islands (Indonesian and Malay: Kepulauan Sunda Besar) are four tropical islands situated within the Indonesian Archipelago, in the Pacific Ocean. The islands, Borneo, Java, Sulawesi and Sumatra, are internationally recognised for their ecological diversity and rich culture. Together with the Lesser Sunda Islands to their southeast, they comprise the archipelago known as the Sunda Islands.

Mainly part of Indonesia, each island is diverse in its ethnicity, culture and biological attributes. The islands have a long and rich history which has shaped their cultural backgrounds.

The Java Sea (Indonesian: Laut Jawa, Javanese: Segara Jawa) is an extensive shallow sea on the Sunda Shelf, between the Indonesian islands of Borneo to the north, Java to the south, Sumatra to the west, and Sulawesi to the east. Karimata Strait to its northwest links it to the South China Sea. Although generally considered to be a part of the western Pacific Ocean, the Java Sea is occasionally considered to be a part of the Indian Ocean.

Borneo (/ˈbɔːrnioʊ/) is the third-largest island in the world, with an area of 748,168 km (288,869 sq mi), and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda Islands, located north of Java, west of Sulawesi, and east of Sumatra. The island is crossed by the equator, which divides it roughly in half. In Indonesia, the island is also known as Kalimantan, which is also the name of the Indonesian region located on the island.

The geology of Borneo was formed beginning in the Mesozoic. It formed part of Sundaland, a region connected to mainland Asia, until it became isolated by sea level rise at the end of the last ice age. With seven unique ecoregions, including large expanses of some of the oldest tropical rainforests in the world, Borneo is rich in biodiversity and endemic species.

The Celebes Sea (/ˈsɛlɪbiːz, səˈliːbiz/ SEL-ib-eez, sə-LEE-beez; Filipino: Dagat Selebes) or Sulawesi Sea (Malay: Laut Sulawesi; Indonesian: Laut Sulawesi; pronounced [ˌlaʊt̪̚ sulaˈwesi]) of the western Pacific Ocean is bordered on the north by the Sulu Archipelago and Sulu Sea and Mindanao Island of the Philippines, on the east by the Sangihe Islands chain, on the south by Sulawesi's Minahasa Peninsula, and the west by northern Kalimantan in Indonesia. It extends 605 km (376 mi) north-south by 780 km (485 mi) east-west and has a total surface area of 472,000 km (182,000 sq mi), to a maximum depth of 6,220 metres (20,406 ft). South of the Cape Mangkalihat, the sea opens southwest through the Makassar Strait into the Java Sea.

The Celebes Sea is a piece of an ancient ocean basin that formed 42 million years ago in a locale removed from any landmass. By 20 million years ago, the earth's crust movement had moved the basin close enough to the Indonesian and Philippine volcanoes to receive emitted debris. By 10 million years ago the Celebes Sea was inundated with continental debris, including coal, which was shed from a growing young mountain on Borneo and the basin had docked against Eurasia.

The Australasian realm is one of eight biogeographic realms that is coincident with, but not (by some definitions) the same as, the geographical region of Australasia. The realm includes Australia, the island of New Guinea (comprising Papua New Guinea and the Indonesian province of Papua), and the eastern part of the Indonesian archipelago, including the island of Sulawesi, the Moluccas (the Indonesian provinces of Maluku and North Maluku), and the islands of Lombok, Sumbawa, Sumba, Flores, and Timor, often known as the Lesser Sundas.

The Australasian realm also includes several Pacific island groups, including the Bismarck Archipelago, Vanuatu, the Solomon Islands, and New Caledonia. New Zealand and its surrounding islands are a distinctive sub-region of the Australasian realm. The rest of Indonesia is part of the Indomalayan realm. In the classification scheme developed by Miklos Udvardy, New Guinea, New Caledonia, Solomon Islands and New Zealand are placed in the Oceanian realm.