This small island lying opposite the Berjaya Resort has a good hard coral diversity. Renggis' fringing reefs are shallow making this a good place for a second dive. The usual dive plan is to enter the water at the easterly side and swim around the island at a depth range of 12 to 15 metres.

The coral formation is mainly Tabletop, Staghorn, Bommies, Brain, Cabbage and Potato on a rather flat bottom.

If you prefer a deeper dive, you could take a detour to the two Thai fishing wrecks which lay in 20 metres of water, but mostly you will be on the back part of the island in search of its resident Black Tip Reef Sharks and Green Turtles.