SNORKELING THE BIOROCK REEFS IN GILI TRAWANGAN
AUTHOR: D.B. DATE: October 2025
If there’s one experience in Gili Trawangan that surprised me more than any other, it was the quiet beauty of the Biorock snorkel tour by NGO Gili Eco trust.. I’ve snorkeled around the Gilis many times, but this was the first time I felt I wasn’t just drifting over the ocean — I was being gently shown how much our life depends on the corals below me.
This tour doesn’t try to impress you with glassboats or similar hype. It’s soft, simple, and deeply reflective — and maybe that’s exactly why it stays with you.
A Simple Beginning With a Purpose
The tour starts at the Gili Eco Trust eco shop, a cozy little place where you’re greeted by upcycled products, recycled art, and friendly faces. Before heading to the water, you watch a short documentary explaining why the reefs needed help and how the Biorock technology is bringing them back to life.
- Why coral reefs are disappearing
- How Biorock technology works
- How restoration projects help protect the Gili ecosystem and why
It’s the perfect introduction to understanding why reefs are essential — not just for marine life, but also for coastal protection, carbon absorption, and local livelihoods. An honest, clear storytelling about coral loss and the restoration efforts happening right here on the party island Gili T. By the time you finish, it becomes clear: Gili T may be famous for its nightlife, but the real party has always been underwater — and it never stops.
A Short Swim to a Different World
From the beach, it’s only a 50-meter swim to the first Biorock structures. Even before reaching them, small flashes of color catch your attention — darting zebra fish, a curious parrotfish, tiny silver schools swirling beneath you.
Then, slowly, the metal frames appear beneath the surface. They look like underwater gardens in progress — coral fragments growing across the structures, soft corals swaying gently, small fish darting in and out of the new shelters. Knowing there are over 200 Biorock structures around Gili T makes the moment feel like you’re witnessing a much larger recovery story.
The marine life around the Biorock area feels surprisingly calm and approachable. My favorite moment was hovering over an anemone and spotting a small pair of clownfish — the unmistakable “Nemo” — darting in and out like playful guardians. And of course, no Gili snorkel is complete without a turtle or two gracefully gliding past. It felt like the underwater world you see in National Geographics or in a Finding Nemo movie — colorful, curious, quietly alive.
One of the highlights of the tour is the snorkeling on a coral-covered Vespa resting on the seabed. Looking like relics from an underwater movie set, and the only motorcycle you will see on Gilis. What a great idea to transform man-made objects into new ecosystems.
Why This Tour Matters More Than It Shouts
This tour isn’t loud about its message. It doesn’t push you or lecture you. Instead, it quietly shows you how much depends on healthy coral reefs:
- Protection for coastlines ecosystem
- Restore damaged reef areas
- Shelter for marine species
- Food sources for entire marine communities
- Educates visitors on the importance of coral reefs
- Supports community-led conservation
It’s eco-tourism at its best — meaningful, fun, and aligned with sustainable travel principles.
Seeing corals regrow on Biorock structures feels hopeful. It reminds you that damaged ecosystems can recover when given time, care, and a little bit of innovation.
Practical Details (From Someone Who Did It)
- Donation: Minimum 100K IDR
- Goes directly to maintaining the Biorock sites.
- Bring: Mask + snorkel (fins optional)
- Rental is easy along the beach, around 40K IDR/day.
- Duration: About 1.5 hours
- Skill level: Easy; calm waters; beginner-friendly.
A Quiet Recommendation
If you’re visiting Gili Trawangan and want to see its true value that’s beautiful but also impactful, the Biorock Snorkel tour is something I would gently recommend. It’s not just about adrenaline education, and eco-conservation— it’s about understanding, and witnessing the ocean in a moment of healing.
Showing you the true spirit of the islands and how local communities are working hard to protect them.
It’s more than snorkeling.
It’s a connection to marine heritage there. And sometimes, that’s the most powerful experience of all.
