The Aru Islands are a geological anomaly that once connected Australia to New Guinea

Countries & Cities · Published 30 September 2026 Swipe more like this →

In short: Floating in the Arafura Sea, the Aru Islands are a cluster of nearly 700 islands that defy simple classification. Geologically part of the Australian continent, they served as a land bridge during the ice ages, creating a unique biological crossroads that has fascinated naturalists and traders for centuries.

The Aru Islands Regency, a group of about 95 low-lying islands in Indonesia's Maluku province, sits on the Australia-New Guinea continental shelf. Unlike the rest of the Maluku archipelago, Aru shares its geological foundation with Australia, New Guinea, and Tasmania. During the ice ages, when sea levels were significantly lower, these islands formed a terrestrial bridge between the Australian mainland and New Guinea. This history explains why the flora and fauna of Aru are distinctly Australasian, belonging to the same lowland rain forest ecoregion as western New Guinea.

Historically, the islands were a vital node in extensive precolonial trade networks, linking local clans to the Banda Islands and beyond. Traditional Aru society was defined by non-hierarchical, lineage-based clans and ritual alliances known as Ursia and Urlima. While European powers, including the Portuguese and the Dutch, sought to control the lucrative trade in pearls, birds-of-paradise, and trepang, the islands maintained a degree of independence. The Dutch East India Company established a presence in the 17th century, but their influence was frequently challenged by local uprisings, including a significant revolt in 1787.

Today, the regency is a diverse administrative unit with a population that reached 112,531 by mid-2024. The islands remain a cultural melting pot where 14 indigenous languages are spoken, all belonging to the Austronesian family. While the economy still relies on traditional industries like pearl farming—which has faced scrutiny over labor practices—the region is also looking toward the future. In 2011, the Indonesian government awarded production-sharing contracts for offshore oil and gas exploration, signaling a shift in how these remote islands are integrated into the global energy market.

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