Beneath the Surface: How Four Seasons Resort Koh Samui Nurtures Thailand’s Coral Reefs

At Four Seasons Resort Koh Samui, the first impression is anchored in the presence of the ocean.  Perched high above the Gulf of Thailand, the resort opens onto a blend of sea and sky.

This is the cinematic arrival that guests encounter, which immediately shifts the rhythm of their day.

Villas tumble down hillsides towards a private cove, hidden pathways reveal unexpected alcoves of calm, and every turn draws one in deeper into the island’s elemental beauty. The scent of salt on the breeze and the murmur of the ocean, always in the background, remind one of its constant presence.

But beyond the panoramic views and tropical ease lies something deeper: an enduring commitment to protecting the very waters that define this island sanctuary.

Daily Commitment to Marine Preservation

Oceans cover more than 70 percent of the Earth’s surface, and are life-enforcing. They produce at least 50 percent of the oxygen we breathe; hence, they need to be preserved with continued stewardship.

Four Seasons Resort Koh Samui is mindful of this enduring fact; therefore, sustainability is not just a symbolic gesture here but is deeply ingrained in the fabric of the resort. It is an ongoing philosophy woven into daily life. This commitment is perhaps most visible beneath the surface, where the resort’s coral rehabilitation efforts are helping restore and protect one of Koh Samui’s most vital natural ecosystems.

The resort has been actively supporting coral restoration efforts designed to strengthen reef resilience and encourage marine regeneration in the surrounding waters. As part of its commitment to understanding the health of the surrounding reef ecosystem, the resort recently undertook a coral survey to assess reef conditions and observe the progress of previously restored coral areas. These efforts reflect a long term investment in the health of the Gulf of Thailand and a belief that meaningful environmental stewardship happens over time.

“The seas are at the heart of Koh Samui's identity, and coral reefs are among its most precious living treasures. Preserving them for our future generations is an act of deep care. Through our ongoing rehabilitation efforts, we hope to play a meaningful role in protecting this extraordinary marine ecosystem that surrounds us," says General Manager Jasjit Assi.

A New and Reimagined Relationship with the Oceans

World Ocean Day is on June 8 and has been observed since 2009, after the United Nations officially recognized it. The 2026 theme is "Reimagine: Beyond the world we know, a new relationship with our ocean." This calls for a shift in mindset. For aeons, the ocean has been a giving source of resources. Whether it be a natural source of protein for more than a billion people or a thriving ecosystem of marine life, it has always provided us, humans. Now it is time to pivot, to give something back and be a steward to the ocean’s rich field of natural treasures.

It calls for a shift from viewing the ocean as an endless resource to recognizing it as a living system that demands collective responsibility.

Four Seasons Resort Koh Samui is deeply committed to supporting the health and preservation of the marine ecosystem that surrounds the island. The resort’s coral rehabilitation program focuses on restoring damaged reef structures and creating conditions for healthy coral growth, helping to nurture a thriving underwater ecosystem for future generations. It is a patient process; one that requires ongoing monitoring, scientific guidance, and collective responsibility, and therefore, one that benefits from a collective buy-in from employees as well as guests.  The resort’s teams have planted more than 20,000 fragments of coral into the reef and have observed significant progress in coral growth.

A Flourishing, Underwater Wonderland

Coral reefs are often called the rainforests of the sea, and for good reason. They support fascinating marine biodiversity, provide shelter and breeding grounds for countless species, and act as natural barriers that protect coastlines from erosion. Around Koh Samui, these reefs are intrinsic to the island’s ecological balance and are deeply connected to the guest experience, shaping everything from snorkelling adventures to the pristine beauty of the shoreline itself.

“The survival rate of replanted reefs has been encouraging, and the baby fishes and crabs seem to be growing in number. The best part has been bringing in our guests into the fold. They enjoy learning about the different species of corals that make up the marine ecosystem around us,” says Thada Whasagool, Sustainability Manager, pointing out that the waters are rich with underwater treasures such as mushroom, galaxy, leaf, staghorn, hump, sea fan, and a variety of creatures. “It’s a multicoloured wonderland down below,” adds Thada, smiling.

Protecting marine ecosystems requires ongoing care, collaboration, and a shared commitment to the natural world. Through coral rehabilitation efforts, regular reef monitoring, and immersive guest experiences, Four Seasons Resort Koh Samui continues to contribute to the long-term health and resilience of the island's marine environment.

The committed teams at Four Seasons Koh Samui have been a force for good, as they step up with their own marine regeneration efforts, mindful resource management, and immersive guest experiences designed to foster a deeper connection with the natural world.

This ethos of care extends across the resort. Whether through sea-focused activities, educational initiatives, or simply the act of observing marine life, guests are invited to feel one with marine life.

The captivating essence of the great ocean needs safekeeping, and the teams of Four Seasons Koh Samui are committed to their role as custodians of its future.

For more information, call +66 2 207 8900, email reservations.thailand@fourseasons.com, or chat via the FS Chat App.