The tourists enjoyed musical performances and then visited tourist attractions on the island such as Ho Quoc Pagoda, Sun World Hon Thom tourist area and a pearl farming facility.
This was the first Thai tourist group to visit Phu Quoc Island on a 5-star cruise.
The Costa Sereni is 290 m long and 62 m high, offering a four-night voyage from Thailand to Cambodia's Sihanoukville and Phu Quoc.
According to a report from the Kien Giang's Department of Tourism, Phu Quoc last year welcomed more than 500,000 visitors, including 82,000 foreigners.