The Loh Namu peninsular has a nice spot for finding big groupers. The best way to dive it is south to north at around 25 meters, just before high tide. This is because most of the bigger fish congregate to the south around a few boulders just before a drop off. There are a couple of small caves housing other interesting specimes and a number of large coral trout and naopleon wrasse that visit this area to breed.
The small island of Indihiang has a couple of good walls with good coral growth and plentiful fish life including snappers, potato grouper and big wrasse. Slack tide is the best time to dive.