Kim Quy Island is a shallow An Thoi reef island off Phu Quoc, with coral gardens, clear water, and plenty of small reef life around the shallows. It works best as a calm-weather boat trip, with snorkeling and easy scuba in the lighter water and a guide plan that can flex if the sea changes. The trip is strongest when you can spend time on the coral shallows instead of chasing a tight schedule, because the weather and crossing can shift quickly.