There are various wonderful snorkeling and diving places in the national park of Koh Chang. Koh Chang is currently developing into an important destination for diving with many dive outfits on this island. The marine national park of Koh Chang has various dives ranging from Coral pinnacles, to shallow coral reefs and deep wrecks. Visibility is around 35 or 45 meters in peak season. The better time to dive is in between Oct and May, but in the seasons of rain there are almost calm days when the diving is pretty good.
Around Koh Rang in the south a person may be able to look for few most pristine reefs in Thailand, with some most staghorn corals and table corals fringing around several small islands there. These reefs also affirm some better variety of marine life like trigger fish, sting rays, moray eels and turtles. Big barracuda, king mackerel and trevelly also feed near to the reefs. Whale sharks are almost the daily visitors to the reefs in the north and they can be observed in every part throughout high season.
For technical and advanced divers every school run trips to some newly discovered sites for wrecking ranging from 45 to 75 meters. Like this, they one day discovered scuba diving which also has a course costs almost 4,500 baht and also courses of PADI open Water are almost 14,500. For well-qualified divers the cost for daily diving is almost 2,500 and 3,000 which is totally based on the diving site and also school.