This is considered one of the best wall dives in the area. Doc Mai is a huge limestone rock that rises steeply out of the sea. On three sides the sheer walls occupied with a different creature in every nook and cranny drop straight down to the sea floor.

This dive is noted for its variety of reef fish and an opportunity to view some of the resident Moray Eels. The east-side of the island is a virtual garden of yellow tube corals and you can explore some of the small caves along the base of the wall.