Islands & Day Trips

An Thoi Archipelago

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The Paradise Islets of Phu Quoc

An Thoi Archipelago In Phu Quoc

The An Thoi Archipelago off the southern tip of Phu Quoc Island consist 15 different islands that are part of the Phu Quoc Marine Park. The An Thoi Islands are also part of the Kien Giang Biosphere Reserve, a UNESCO designated area. The best way to explore the wonders of these islands is by boat – either through a private charter or part of an organized tour.

Map of An Thoi Islands

The following is a simple map of the An Thoi Island archipelago highlighting all the islands:

An Thoi Islands

The most popular islands in the An Thoi archipelago to visit are:

Topography

The mountainous An Thoi Islands are situated in the eastern part of the Gulf of Thailand. The island topography is represented by relatively high plateaus bordered by steep slopes. The rocky terrain consists mainly of sandstone and conglomerates occurring within a flat dipping complex and partially covered by quaternary sediment. A characteristic feature of the islands is the steepness of its slopes, which is well pronounced in the coastal zone and on submarine slopes.

Hydrology

The An Thoi Islands are located in turbid and nutrient rich waters which is why the area is teeming with macro and micro life. There is also a large concentration of dissolved suspended matter (more than 100 mg/L) which makes the water less visible than other locations along the Gulf. Also, there are constant currents usually running in the same direction (clockwise in the rainy season and counter clockwise in the dry season) which can make diving difficult at depths greater than 15 meters.

What to see

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Where to do

*Note: Hiring a private charter boat can be done in two ways: i) commissioning a boat and captain from your agency on the island or ii) asking a fisherman to ride you around. The latter is by far the cheaper option.

Where to eat

Where to stay

An Thoi Island Reefs

There are many coral reefs along the An Thoi Archipelago however most tour agencies will not mention them because they have already established a fixed snorkeling route. If you want to snorkel the best spots and save time get our snorkeling guide.

The coral reefs here are not comparable to those that are typically seen in Indonesia, Philippines, Malaysia, and other parts of the world. If you are a well traveled snorkeler and join an organized snorkeling tour, you may be disappointed to see a lot of the reef being dead. The water here is nutrient rich causing algae to blossom and consuming a lot of oxygen, which results in the delicate corals being crowded out. Snorkeling tours include a lunch however if you want to try Sea Urchin, then you have to pay an additional fee.

Snorkeling An Thoi Islands

Although it is not part of the An Thoi Islands, some tour operators mislead tourists and take them to Ong Doi Cape for a quick snorkeling excursion and tell them they are visiting the archipelago. Ong Doi Cape (Mui Ong Doi) is located at the very southern tip of Phu Quoc Island. This area has historical significance as the Emperor Gia Long’s boat got stuck in the corals found here while he was fleeing the Tay Son army and a local islander rescued him. The coral reef here is not as spectacular as those found elsewhere on Phu Quoc which is why we highly recommend our snorkeling guide.

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