The Bajau Laut: Indonesia’s Sea Nomads

Who are the Bajau Laut?

The Bajau Laut belong to the wider Sama-Bajau peoples, spread across the Sulu and Celebes Seas which are the waters between Indonesia, Malaysia and the southern Philippines. “Laut” means sea, and it is the sea-dwelling Bajau who have drawn the most attention: families who once spent their whole lives aboard houseboats known as lepa-lepa, coming ashore mainly to trade, to bury their dead, or to shelter from storms.

Their origins are layered rather than simple*. Genetic research points to a mix of Austronesian and Papuan ancestry, with roots in the maritime communities of southern Sulawesi and Borneo, dispersing across the archipelago over many centuries as people followed trade and fishing routes. They are not a single tribe so much as a network of related communities, bound by a shared language family and a shared life on the water.

The name “sea gypsies” is the one many travellers know, though it is an outside label rather than one the Bajau use for themselves. Today most tribe members have settled in stilt villages built over the reef, or in coastal settlements, yet the rhythm of daily life still follows the tides.

*The older claim that the Bajau descend from a migration out of Taiwan and the Philippines “over 4,000 years ago” is an oversimplification. Genomic studies suggest a more complex, admixed ancestry and a later ethnogenesis.

A life shaped by the sea

What sets the Bajau apart is not only how much time they spend on the water, but how their bodies have adapted over centuries. Divers spend long shifts below the surface with little more than wooden goggles and a set of weights, spearing fish and gathering shellfish and sea cucumbers. Some can hold their breath for several minutes and reach depths of around 70 metres.

For a long time, this was put down to lifelong practice alone. Then, in 2018, a study in the journal Cell found something more unusual. Researchers led by Melissa Ilardo measured the spleens of a Bajau community in Sulawesi and found them roughly 50 percent larger than those of their land-based neighbours. And this held true whether or not a person dived regularly. The difference appeared to be inherited, not simply trained.

The reason matters. The spleen acts as a reservoir of oxygen-rich red blood cells; when the body dives, it contracts and releases that reserve into the bloodstream, extending the time a diver can stay under. The researchers linked the larger spleen to a variant of a gene called PDE10A, making the Bajau one of the clearest documented cases of natural selection shaping a living human population around a way of life.

One common myth is worth correcting here. The idea that sea nomads can see sharply underwater without goggles comes from studies of a different people; the Moken of the Andaman Sea, whose children were studied for their underwater vision. The Bajau still rely on their hand-carved wooden goggles..

Beliefs, music and craft

Most Bajau today identify as Sunni Muslim, but older beliefs have not disappeared. Many communities still recognise a world of sea spirits and ancestors, marked by offerings and small rituals, and in some places guided by figures who act as intermediaries between the living and the unseen.

Music and dance hold a central place in community life. The igal, a dance whose slow, fluid movements echo the motion of the sea, is performed at weddings and celebrations. It is often accompanied by the gabbang, a wooden xylophone, the pulau flute, and ensembles of gongs and drums. Songs handed down by ear carry a community’s history and its attachment to the ocean.

*Instrument and dance names vary across Sama-Bajau regions and spellings (e.g. pulau / palau / suling; igal vs daling-daling; kulintangan gongs).

The Bajau today

The nomadic life of earlier generations has largely given way to settled communities. Many Bajau now live in stilt villages above the water or in coastal settlements, and children increasingly attend school ashore. Fishing grounds have come under pressure, and some old skills are practised less frequently than they once were.

Even so, the connection to the sea endures. For many Bajau, the water remains home in every sense that matters — a source of food, identity and belonging that no move ashore has erased.

Where you might encounter the Bajau

A voyage through the waters of Sulawesi and eastern Indonesia can bring you near Bajau communities. Stilt villages stand in parts of the Togean and Banggai Islands, and you may pass houseboats and fishing platforms across the wider region.

These are not staged encounters, and they are best approached with the respect you would want shown to your own community: observing quietly, asking before photographing people, and following your crew’s guidance. Seen this way, a passing exchange with a Bajau fisherman, or the sight of a village rising on stilts from a turquoise shallows, becomes one of the special moments of cruising this part of Indonesia.

If you would like to explore the waters the Bajau call home, our team can help you plan a private voyage through Sulawesi and the surrounding islands.