Ko Sichang boasts the nearest coral to Bangkok, and experienced divers say it's as good as any diving in the northern Gulf--with far fewer people than places like Ko-Larn and other typical destinations from Pattaya.
You will see a lot more than even the luckiest snorkeler. In one day visitors have seen turtles, sea horses, pipefishes, giant clams, morays, large anemones, and any number of kinds of fish and coral. For a dive boat, or tank refills on the island, contact Pan & David (see the eat page); for complete dive tours (four people minimum), contact