Off the southern tip of Phu Quoc are the tiny An Thoi Islands. These 15 islands and islets can be visited by chartered boat, and it's a fine area for sightseeing, fishing, swimming and snorkeling. In this view is Hon Dam Ngoai island (Hòn Dăm Ngoài), that support some sea-grass gardens with the coral reef and abundance of smaller tropical fish, with the occasional grouper, tuna and mackerel, ect.