Loading…
A nomadic maritime community of the Andaman Sea, known for exceptional underwater vision and for surviving the 2004 tsunami through oral knowledge.
The Moken are a traditionally nomadic maritime people living along the coasts and islands of the Andaman Sea, chiefly in southern Myanmar and Thailand. Often called sea nomads or sea gypsies, they have historically spent much of the year aboard boats, moving between islands and coming ashore mainly during the monsoon. Their culture is built almost entirely around the sea, and their knowledge of winds, tides, marine life and lunar cycles is transmitted orally through myths, songs and direct observation rather than in writing.
Type: PhenomenonA traditionally nomadic maritime community of the Andaman Sea
Live chiefly along the coasts and islands of southern Myanmar and Thailand
Historically spend much of the year aboard boats, coming ashore mainly during the monsoon
Moken children can see underwater with roughly twice the clarity of other children
Knowledge of the sea, winds and lunar cycles is transmitted orally, not in writing
Oral narratives of past tsunamis enabled many to survive the 2004 Indian Ocean tsunami
Frequency: Indigenous communities and traditional knowledge appear in UPSC Prelims and in Mains questions on disaster management and society
Human eyes are built to focus in air. Underwater, water has almost the same refractive index as the cornea, so the cornea loses most of its focusing power and vision becomes blurred. Moken children compensate by constricting the pupil to a very small aperture, which increases the depth of field and sharpens the image, in the same way that a narrow aperture on a camera brings more of a scene into focus. They also adjust the shape of the lens. Both are learned responses developed through years of diving from early childhood, not inherited traits, which is why researchers have been able to train other children to do much the same.
It is the optical equivalent of squinting, or of stopping down a camera lens: less light gets through, but what does get through is far sharper.
The Moken are the most cited example of indigenous knowledge outperforming formal warning systems. During the 2004 Indian Ocean tsunami, when no warning system covered the region, many Moken read the receding sea and the behaviour of the water as signs described in their oral traditions, and moved to high ground in time. Their survival rate was strikingly high. The lesson drawn by disaster risk reduction practitioners is that oral tradition can encode the memory of rare, high-impact events across generations far longer than institutional memory tends to last. The same period, however, exposed the fragility of that culture: post-tsunami resettlement, restrictions on nomadic movement, national park boundaries and the pull of the tourism economy have pushed the Moken towards settled life, which erodes precisely the immersive experience of the sea on which both their knowledge and their underwater vision depend.
Moken: nomadic maritime people of the Andaman Sea, in southern Myanmar and Thailand
Known as sea nomads or sea gypsies
Moken children see underwater with about twice the clarity of other children
The adaptation works through pupil constriction and lens adjustment, and is learned rather than inherited
Oral narratives of past tsunamis helped many survive the 2004 Indian Ocean tsunami
A standard example of indigenous knowledge in disaster risk reduction
Their nomadic way of life is under pressure from resettlement and tourism
Along the coasts and islands of the Andaman Sea, chiefly in southern Myanmar and Thailand. They have traditionally spent much of the year living aboard boats.
They constrict their pupils to a very small aperture and adjust the lens, which sharpens the image in the same way a narrow camera aperture does. It is a learned ability developed through years of diving, not an inherited trait.
Their oral traditions contained narratives of earlier tsunamis, so many recognised the warning signs in the receding sea and moved to high ground before the wave arrived.
They demonstrate that oral tradition can preserve the memory of rare, high-impact events across generations, sometimes more effectively than formal institutional warning systems.