Manta ray ray with diver at the Koh Bon dive site

Koh Bon dive site

Discover the Hidden Gem of Similan Islands National Park: Koh Bon
Nestled in the heart of the Andaman Sea, Thailand’s Similan Islands National Park is renowned for its stunning underwater landscapes, vibrant coral reefs, and diverse marine life. While many travelers flock to well-known destinations like Similan, Tachai, and Surin Islands, there’s a hidden gem waiting to be explored – Koh Bon. In this article, we’ll introduce you to the allure of Koh Bon and why it’s a must-visit spot for divers and nature enthusiasts.

The Enchanting Koh Bon:

Koh Bon is a small, uninhabited island that lies to the northwest of Similan Islands National Park. It is accessible by boat and makes for an excellent day trip from Khao Lak or Phuket. What sets Koh Bon apart from its neighboring islands is its incredible underwater world. The island is renowned for its remarkable marine biodiversity, pristine dive sites, and a chance to encounter some of the ocean’s most majestic creatures.

World-Class Diving:

Koh Bon is a diver’s paradise. The island’s crystal-clear waters provide excellent visibility, making it an ideal location for underwater exploration. Divers can encounter a variety of marine life, including vibrant coral gardens, colorful reef fish, and fascinating macro critters. But what truly sets Koh Bon apart is the possibility of encountering large pelagic species, such as manta rays.

Manta Ray Haven:


Nestled in the azure embrace of the Andaman Sea, Koh Bon emerges as an icon among divers worldwide, celebrated for its reputation as one of the best places on Earth to encounter the majestic manta rays. These oceanic wonders, boasting wingspans that can reach up to an impressive 5 meters, transform the underwater realm into a captivating spectacle of grace and elegance.

Divers, drawn by the allure of these gentle giants, embark on a pilgrimage to Koh Bon, seeking an intimate connection with these mesmerizing creatures. The experience is nothing short of extraordinary as the manta rays, with their distinctive cephalic fins and undulating movements, gracefully glide through the crystalline waters surrounding the island. The encounter becomes a dance between the divers and the rays, a silent communion beneath the surface.

Embarking on an Underwater Odyssey at Koh Bon: A Haven for Majestic Manta RaysOne of the defining features that sets Koh Bon apart is the presence of manta ray cleaning stations. These underwater hubs serve as a natural spa for the rays, where smaller fish delicately attend to the removal of parasites from the skin of the majestic beings. It’s a unique and mesmerizing spectacle that enriches the diving experience, providing a rare glimpse into the symbiotic relationships that flourish in the depths.

As divers descend into the depths surrounding Koh Bon, they enter a realm where time seems to slow, and every fin stroke unveils a new facet of marine wonder. The anticipation of encountering a manta ray creates a sense of excitement, and as the first silhouette emerges in the distance, the heart quickens. The rays, often spotted in groups, engage in a graceful ballet, moving effortlessly through the water, leaving observers in awe of their sheer size and beauty.


Gentle Giants

The manta rays of Koh Bon are not just marine creatures; they are ambassadors of the ocean’s grandeur. Their presence underscores the importance of marine conservation and responsible diving practices. Divers at Koh Bon are not merely spectators; they become stewards of this delicate ecosystem, fostering a deep appreciation for the interconnectedness of marine life.For those seeking a truly immersive experience, some dive operators at Koh Bon offer specialized excursions focused solely on manta ray encounters. These excursions often include knowledgeable guides who share insights into the behavior and biology of manta rays, enriching the diving adventure with educational value.

Wonders of the marine world

The waters around Koh Bon, with their vibrant coral reefs and diverse marine life, further complement the manta ray encounters, creating a holistic underwater experience. Colorful reef fish, elusive sea turtles, and intricate coral formations contribute to the kaleidoscope of marine biodiversity that defines Koh Bon as a premier diving destination. In conclusion, a journey to Koh Bon transcends the ordinary; it is an underwater odyssey where divers commune with majestic manta rays and become stewards of the ocean’s splendor. The memories forged amidst the azure depths endure, leaving an indelible mark on the hearts of those fortunate enough to explore this underwater haven. Koh Bon stands as a testament to the wonders of the marine world, inviting adventurers to dive into the embrace of its crystalline waters and discover the magic that lies beneath the surface.

Dive Sites at Koh Bon:

Koh Bon offers a range of dive sites suitable for divers of all skill levels. From the sheltered eastern side, which is perfect for novice divers, to the challenging currents on the western side for more experienced divers, Koh Bon caters to a diverse range of preferences. The Ridge, Koh Bon Pinnacle, and Koh Bon West Ridge are some of the must-visit dive sites around the island.

Spectacular Marine Life:

Apart from the manta rays, divers at Koh Bon can also spot other pelagic species like whale sharks, reef sharks, and leopard sharks. The vibrant coral reefs are teeming with colorful fish, sea turtles, and various species of nudibranchs. Koh Bon’s underwater world is a photographer’s dream, offering endless opportunities to capture the beauty of marine life.

Conservation and Sustainability:

Koh Bon is a protected marine area within the Similan Islands National Park. Divers and tour operators here follow strict guidelines to ensure the conservation of the delicate ecosystem. Responsible diving practices are encouraged to protect the marine life and coral reefs.


Koh Bon, within the Similan Islands National Park, is a hidden gem that offers a unique and unforgettable diving experience. With its incredible marine biodiversity, the chance to encounter manta rays, and a range of dive sites suitable for all levels, Koh Bon is a must-visit destination for any nature enthusiast or diver. By embracing conservation efforts and practicing responsible diving, we can ensure that this pristine underwater world remains a treasure for generations to come. Make sure to add Koh Bon to your travel bucket list for an awe-inspiring underwater adventure!

Koh Bon Ridge dive site map


Koh Bon pinnacle dive site map and information


Dive at Koh Bon on one of these dive trips

MV Lapat liveaboard

MV Lapat
2 Days – 1 Night Liveaboard Trip

Manta Queen 2 twin bed cabin

Talamang Dee 18
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MV Dolphin Queen liveaboard

MV Dolphin Queen
3 or 5 Days Liveaboard Trips