Accordingly, visitors taking part in this tour will have to wear a special helmet with oxygen supply and follow a tour guide.
During a walking tour under the sea within 15 to 20 meters on the seabed, visitors have a fascinating experience when watching the corals and other sea creatures.
As scheduled, the tour will open to public on May 1.
Located 15 kilometres east of Cua Dai Beach in Hoi An city, Cu Lao Cham consists of eight islets and a UNESCO-recognised Biosphere Reserve.
Nearly 2,550 islanders live in four villages and make their living by aquatic farming and tourism.
The island welcomes over 50,000 tourist arrivals every year.