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Spend a day diving the An Thoi Islands off southern Phu Quoc: two guided certified dives, lunch aboard a wooden boat, and transfers from Duong Dong. Expect warm water, colorful reefs and straightforward logistics suitable for experienced divers.
Spend a day diving the An Thoi Islands off southern Phu Quoc: two guided certified dives, lunch aboard a wooden boat, and transfers from Duong Dong. Expect warm water, colorful reefs and straightforward logistics suitable for experienced divers.
You step from the pier into warm, saline air and the wooden boat rocks gently toward a chain of karst-formed islets off southern Phu Quoc. The An Thoi archipelago pulls you into clear water where staghorn coral and low, rounded bommies rise like underwater cliffs. Below the surface, colors sharpen—parrotfish graze, and reef structures spread in bands of orange and mauve.
Verified experiences and guided adventures in the surrounding area.
Operated by OnBird Phu Quoc · Duong Dong, Kien Giang
You step from the pier into warm, saline air and the wooden boat rocks gently toward a chain of karst-formed islets off southern Phu Quoc. The An Thoi archipelago pulls you into clear water where staghorn coral and low, rounded bommies rise like underwater cliffs. Below the surface, colors sharpen—parrotfish graze, and reef structures spread in bands of orange and mauve.
The islands sit where the Gulf of Thailand meets seasonal currents; local fishing communities have worked these waters for generations and the reefs were long a living map for sailors and traders. Geologically the area is composed of limestone outcrops and sandy channels, creating sheltered reefs and deeper passes that concentrate marine life. Culturally, landings at small harbors still reflect a slow maritime rhythm—fishermen mend nets while operators serve simple, fresh lunches aboard.
Practically, the full-day certified-diver trip runs about 6–8 hours including hotel transfer, two guided dives (max ~18 m), and lunch onboard. Expect 40–50 minute bottom times, warm water (mid-to-high 20s–low 30s °C), and variable visibility depending on season and tide. Operators supply tanks, weights and basic gear, but bring your certification card and a mask you trust. Safety briefings and an English-speaking dive leader are standard; sites can change if the sea is unsettled.
Plan for sun between dives, reef-safe sunscreen, and a light wetsuit if you get cold on surface intervals. Respect coral—no touching or fin kicks against reef. With straightforward logistics and vibrant marine life, this is a practical, high-reward day for certified divers looking to explore Vietnam’s southern reefs.
moderate.
6–8 hours.
Moderate fitness—able to handle boat transfers, basic equipment handling and two dives with up to 50-minute bottom time.
Yes — this trip is for certified divers only; you must present your certification prior to boarding.
Guided dives on this trip go to about 18 meters (60 feet) maximum under instructor supervision.
Yes — shared hotel pickup/drop-off (Duong Dong center) and lunch on board are included; surcharges may apply for pickups farther away.
Operators may change sites or cancel for safety; cancellations at least 24 hours ahead are refundable per the booking policy.
An Thoi has long been a fishing and small-trading hub; the reefs were traditionally used by local fishers and now support a growing dive tourism economy.
Coral communities here are vulnerable to bleaching and anchor damage—choose operators that use mooring buoys, practice no-touch diving, and promote reef-safe sunscreen.
OnBird Phu Quoc operates guided outdoor trips and adventures with an emphasis on safety, stewardship, and memorable experiences.
You step from the pier into warm, saline air and the wooden boat rocks gently toward a chain of karst-formed islets off southern Phu Quoc. The An Thoi archipelago pulls you into clear water where staghorn coral and low, rounded bommies rise like underwater cliffs. Below the surface, colors sharpen—parrotfish graze, and reef structures spread in bands of orange and mauve.
You step from the pier into warm, saline air and the wooden boat rocks gently toward a chain of karst-formed islets off southern Phu Quoc. The An Thoi archipelago pulls you into clear water where staghorn coral and low, rounded bommies rise like underwater cliffs. Below the surface, colors sharpen—parrotfish graze, and reef structures spread in bands of orange and mauve.
The islands sit where the Gulf of Thailand meets seasonal currents; local fishing communities have worked these waters for generations and the reefs were long a living map for sailors and traders. Geologically the area is composed of limestone outcrops and sandy channels, creating sheltered reefs and deeper passes that concentrate marine life. Culturally, landings at small harbors still reflect a slow maritime rhythm—fishermen mend nets while operators serve simple, fresh lunches aboard.
Practically, the full-day certified-diver trip runs about 6–8 hours including hotel transfer, two guided dives (max ~18 m), and lunch onboard. Expect 40–50 minute bottom times, warm water (mid-to-high 20s–low 30s °C), and variable visibility depending on season and tide. Operators supply tanks, weights and basic gear, but bring your certification card and a mask you trust. Safety briefings and an English-speaking dive leader are standard; sites can change if the sea is unsettled.
Plan for sun between dives, reef-safe sunscreen, and a light wetsuit if you get cold on surface intervals. Respect coral—no touching or fin kicks against reef. With straightforward logistics and vibrant marine life, this is a practical, high-reward day for certified divers looking to explore Vietnam’s southern reefs.