One of the interesting things about Koh Chang is the fact that there is sometimes Whale Sharks around…. and I would really really like to be diving with a Whale Shark, this huge but harmless shark… not a ‘man-eater’, but a filter feeder…
The dive centre BB Divers reports that the Whale Shark has been spotted at the dive site called Hin Raab South (the locals call it Hin Laab) 5 km south of Koh Chang, which is a unterwater rock – I will definately have a dive or 2 at Hin Raab South!
And if you’re not sure what a Whale Shark looks like then check this YouTube clip of a Whale Shark in the waters around Koh Chang – its incredible.

Hin Rang Yai
And it seems like Hin Rang Yai should also be included – I found this text about it:
A great place for pelagic spotting is Hin Rang Yai, a set of pinnacles starting just below the surface and descending to 27m on the west side features mainly rocks with overhangs and boulders. For instance leopard and whale sharks along with black blotched stingrays provide fairly regular encounters. At 14m on the south side of this spot is a soft coral garden with resident triggerfish, sweetlips and potato grouper. There are numerous examples of both hard and soft corals in the area, and the marine life is both plentiful and diverse. Blue-spotted stingrays as well as hungry reef sharks and turtles are all also seen along the reefs.