North Andaman

North Andaman Diving Day Trips with the “Blue Marlin”

The Blue Marlin, our specially designed dive speedboat tailored to the needs of our divers, takes you on day trips exclusively to the best diving spots in Thailand.

With a maximum of only 20 divers on board and a group size of maximum 4 divers, we offer exclusive day trips at fair and affordable prices.

For our Nitrox or Enriched-Air certified divers, we offer (If available) free Nitrox on our boat!

As the operator and owner of the dive speedboat “Blue Marlin,” we come with many years of experience in the industry. Our professional approach ensures customer satisfaction, making us the preferred choice for divers from all parts of the world.

thailand reef








Richelieu Rock

Koh Bon

Richelieu Rock

Koh Tachai

Richelieu Rock

Richelieu Rock

Koh Bon

Richelieu Rock ฿6500

2 Dives

Koh Bon ฿6200

2 Dives

Koh Tachai ฿6200

2 Dives

North andaman aum ascuba blue merlin

Don’t forget your Comprehensive Diving Insurance for peace of mind

The Dive Sites

Richelieu Rock: A Diver’s Paradise

Richelieu Rock is one of the most famous and sought-after dive sites in Thailand, and for good reason. Located in the Andaman Sea, about 18 kilometers east of Surin Island and approximately 200 kilometers north of Phuket, Richelieu Rock is a single limestone rock that rises from the depths of the sea and extends just below the water surface.

The underwater landscape of Richelieu Rock is fascinating and diverse. Around the rock, there is a variety of colorful coral formations, gorgonians, anemones, and sponges. There are numerous overhangs, crevices, and reefs that can be explored, providing a haven for a wide variety of marine life.

Richelieu Rock is known for its impressive marine diversity. Divers have the opportunity to discover a wide variety of marine creatures, including large schools of barracudas, mackerels, and other pelagic fish. It is also a hotspot for whale sharks, especially from February to May. Mantas, leopard sharks, nudibranchs, and a variety of other fish species are also frequently encountered. The underwater world around Richelieu Rock is a paradise for underwater photographers and nature enthusiasts.

The diving conditions around Richelieu Rock can vary depending on the prevailing currents. Sometimes, there can be strong currents, so it’s important for divers to have experience in diving with currents. Visibility is usually excellent and can reach up to 30 meters. The diving depth ranges from 5 to 40 meters, with the best sightings often occurring in the slightly deeper areas.

Aum Scuba offers day trips to Richelieu Rock from Khao Lak, through our Partners at Wetzone Divers using their own high-speed dive boat, the “Blue Marlin.” The boat usually departs in the morning at 8:45 am and returns in the afternoon around 4:00 pm.

During the excursion, two dives are conducted. There is also time for surface intervals and refreshments/lunch on board. It is advisable to check the weather conditions before booking a dive trip, as bad weather may affect the trip or require alternative destinations.

Richelieu Rock is undoubtedly a dive site that divers should not miss. With its spectacular underwater landscape, impressive marine diversity, and varied diving conditions, it offers an unforgettable diving experience.

Unforgettable Diving Experience: Explore the Beauty of Koh Bon with Aum Scuba

Koh Bon is a dive site located in the Similan National Park, situated in the Andaman Sea off the coast of Thailand. The island is approximately 20 kilometers north east of the main group of Similan Islands.

The underwater landscape of Koh Bon is impressive, offering a variety of underwater formations such as reefs, rock formations, and pinnacles. The reefs are covered with colorful corals that provide a multitude of habitats for marine life. There are also overhangs, crevices, and caves to explore. The underwater scenery is generally well-preserved, providing an impressive backdrop for divers.

Marine diversity at Koh Bon is abundant. Apart from the impressive manta rays for which the dive site is known, there is a variety of other marine inhabitants. Divers can spot barracudas, tunas, groupers, eagle rays, stingrays, leopard sharks, and a wide range of reef fish. The coral reefs are populated by colorful tropical fish, nudibranchs, crustaceans, and other invertebrates.

The Koh Bon dive site is particularly famous for its large marine creatures, especially encounters with manta rays. The chances of seeing mantas here are very high. The island has two main dive sites: Koh Bon Pinnacle and Koh Bon West Ridge.

Koh Bon Pinnacle is an underwater mountain that drops down to a depth of about 30 meters. Here, divers can observe a variety of marine life, including barracudas, tunas, groupers, and different species of reef fish. Manta rays are often encountered near the pinnacle while they are feeding on plankton.

Koh Bon West Ridge is a shallower dive site located on the western side of the island. There are various coral formations providing an ideal habitat for a variety of reef fish and invertebrates. Divers can also encounter eagle rays, stingrays, and leopard sharks here.

The diving conditions at Koh Bon are usually good. Visibility typically ranges between 20 and 30 meters, providing clear views of the underwater world. Water temperatures usually range between 28 and 30 degrees Celsius, offering pleasant diving conditions.

Aum Scuba offers day trips to Koh Bon, again through their partners Wetzone Divers using their own high-speed dive boat. The boat departs from Nam Kem (approximately 20 kilometers north of Khao Lak) and takes about 1 hour to reach the dive site.

Day trips include two dives with breaks for surface intervals and rest/lunch between dives.

Koh Bon is a stunning dive site suitable for both experienced divers and beginners and snorkelers. With its rich marine life and the possibility of encountering manta rays, it is a highlight for any diver exploring the Similan National Park.

Book your Koh Bon dive trip with Aum Scuba today and experience an unforgettable diving experience!

Diving at Koh Tachai: Experience the Magic of the Underwater World with Aum Scuba Phuket

Koh Tachai is an island in Similan National Park, located approximately 70 kilometers northwest of the Thai coast in the Andaman Sea. The island is surrounded by white sandy beaches and covered in lush jungle. It is a popular destination for day trips from Phuket, as it is relatively close and offers some of the best diving in the Similan Islands.

The diving site around Koh Tachai offers an impressive underwater landscape. Divers can explore spectacular coral gardens, fascinating rock formations, and steep reef walls. The visibility is usually excellent, reaching up to 30 meters, allowing for clear and colorful dives.

The waters around Koh Tachai are known for their rich marine biodiversity. Divers can discover a wide variety of marine creatures, including colorful corals, tropical fish of all shapes and sizes, rays, turtles, and a variety of other marine life. There is also a chance to have awe-inspiring encounters with manta rays and even whale sharks.

The diving conditions around Koh Tachai are generally good, but stronger currents can occur. It is recommended that divers have experience in drift diving or be accompanied by an experienced dive guide. The depth of the dives can vary depending on the site, but there are also shallower areas suitable for less experienced divers.

Aum Scuba Phuket offers day trips to Koh Tachai, using our friends at Wetzone Diver in their own speedboat “Blue Marlin” to transport divers from the coast to the dive site. These day trips include 2 dives, allowing you to explore the underwater world around Koh Tachai.

Please note that access to Koh Tachai and other islands in Similan National Park is seasonal. The park is open from mid-October to mid-May, while it is closed to visitors during the monsoon season.

To book your Koh Tachai day trip with Aum Scuba Phuket, please contact us today.

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