Similan Dive Sites
Shark Fin Reef
Shark fin reef is a formation of granite boulders and hard corals which is 1 km to the southeast of island 3 (koh Pa-Yan). The site itself is approximately 1km long and lies from the northwest to the southeast of the islands, and is situated north of Boulder City.
Near the sandy areas, you are likely to find leopard sharks, white tip and black tip reef shark, Kuhl’s stingrays and spotted garden eels. Furthermore the site is one of the few areas in the Similans where you can see Napoleon wrasse and humphead parrotfish. Bigger-than-usual adult cube boxfish are often seen particularly in the shallow waters of the east. Among the boulders, a lot of camouflaged marine life can be seen, including octopuses and devil scorpionfish. Pelagic fish that can be seen are bluefin trevally, giant trevally and tunas. Manta rays can be spotted during the month of April and whale sharks have been reported in the vicinity as well.
This is a good dive site if you are on the lookout for larger marine life. In the mornings, you may encounter a reef shark lying on the sand bed, or other big marine life wandering around, often in search of plankton. So do not just keep looking for the smaller creatures of the ocean. Otherwise you may miss out on the magnificent moment when a manta ray swims over your head! On a different note, there is a buoy on the northwest end.
As mentioned earlier, shark fin reef is a long site. The top of most boulders that make up the site come up to a depth about five to eight meters. Thus, you will have to decide which side you would like to dive. In proper conditions, with favorable current and plenty of remaining no-decompression limit time, divers may be able to cut across to the other side at the end of the dive.