Discover the hidden world of mangroves. Ancient “walking trees” that protect coastlines, nurture marine life, and sustain local communities in Indonesia.

The Tree That Walks.

The first thing I noticed was the silence.

Not the absence of sound, but a different kind of listening. The tide had slipped away, leaving behind a forest that did not quite belong to land or sea. Before me stood trees on stilts, their roots rising from the mud like fingers searching for air.

“They walk,” someone said quietly beside me.

I looked again.

The mangroves did not move, not in any way I could see. But their roots spread outward in all directions, anchoring, reaching, testing the ground as if they had once taken a step, and might again.

These were ancient trees. Older than memory. Long before humans walked these shores, mangroves had already learned how to survive here, tens of millions of years ago. There was something quietly deliberate about them.

And somehow, they never left.

Photo by Trubavin. Mangrove trees at coastline Sumbawa Indonesia.

Photo by Pavel Sipachev. Mangrove trees in Baluran park. East Java, Indonesia.

I stepped carefully into the mud, watching where I placed my feet. Around me, thin spikes pushed up through the surface like breathing straws

“They need air,” my guide explained, noticing my curiosity. “The mud has none.”

It felt less like survival, and more like quiet mastery. In soil where roots would suffocate, mangroves had grown their own lungs, lifting themselves above the ground, breathing through the tide. Their tangled systems held them steady in shifting earth, where land and water are never quite decided.

And when it came time to send their young into the world, they did not release seeds to chance.

They gave them a head start.

From the branches hung long green pods already alive, already growing. When they dropped, they did not simply fall. They floated. They travelled. They searched.

Some would drift for days, even weeks, before finding a place to begin again.

Mangrove propagules hanging from branches.

I crouched at the water’s edge and looked closer.

Beneath the tangled roots, the world changed again.

What appeared chaotic above was, below the surface, a kind of order. A city. Layers of life stacked upon one another, fish flickering between shadows, crabs navigating the maze, shells clinging to every surface.

Everything here was protected.

Everything here was growing.

The roots, dense and interwoven, formed a living barrier, one that softened waves, trapped sediment, and held the shoreline in place. In storms, when winds rise and seas push forward with force, it is these forests that stand first.

They break what would otherwise destroy.

Photo by Ethan Daniels. Mangrove forest in Raja Ampat, Indonesia. Prop roots covered in colourful sponges serve as important tropical habitat for many juvenile fish and invertebrates.

Later, in a nearby village, I began to understand their importance more deeply.

“They protect us,” a fisherman told me, gesturing toward the forest.

At low tide, women moved through the mud with quiet purpose, baskets balanced as they searched for crabs and shellfish hidden beneath the surface. Children followed close behind, learning what to look for, where to step, what to leave.

For many families, the mangroves are not just a boundary between land and sea, they are the pantry, the pharmacy, and the workshop.

From these trees come food, fuel, and medicine. Bark is used for dyes. Fruit is ground into flour. Leaves and roots are prepared into remedies passed down through generations, treating wounds, infections, fevers, and more.

Nothing is wasted.

Everything is understood.

And in some places, new ways of living alongside the forest are emerging, where fish and mangroves are cultivated together, sustaining both the land and the people who depend on it. A way of life shaped by tide and season.

Photo by Anucha Pimnon. People planting mangrove saplings.

Photo by Danung Arifin. Planting Mangroves, Kendari, Southeast Sulawesi, Indonesia.

Photo by Danung Arifin. A resident selects mangrove seedlings to be planted on the coast of Kendari, Southeast Sulawesi, Indonesia.

As the tide returned, the water slowly reclaimed the forest. The roots disappeared, one by one, until only the trees remained still, composed, as though they had never moved at all.

But I knew better now.

These were not static things.

They walked, quietly, patiently, not across land, but through time. Perhaps that was the only movement that mattered.

Photo by Petr Zamecnik. Incoming tide covering mangrove roots.

Editor’s Note

Mangroves are among the most important ecosystems on Earth, yet they are increasingly under threat. Protecting them means protecting coastlines, communities, and countless forms of life that depend on their quiet strength.
Kat

Written with deep respect for the forests and the lives it shelters.