In Phu Quoc you can find some dive sites around the island; most suggest to go to An Thoi archipelago very close to Phu Quoc where you can see coral reefs and many colourful fishes, but you’ll not find for example large fishese and/or manta.
Scuba divers can attest to the spiritual highs which result from cruising the ocean’s silent depths. With its hard and soft coral reefs, calm and clear warm waters, and swarms of tropical fish, Phu Quoc offers superb scuba diving. Many of these underwater gardens have never been dived before, as scuba diving only arrived on the island recently, in the year 2002 to be precise. TRates range from US$100 for a full day’s outing with three dives (each 45-60 minutes), to US$40 for a night dive off the beach. If you don’t have certification to scuba dive try out a beginner’s “try dive” in a swimming pool or on a shallow beach. For certified scuba divers Phu Quoc is a great place to learn new skills. If you want to become a dive master the course takes between 1-3 months and costs US$1500.