Ngerchong Inside is a gentle slope densely populated with antler corals and a wide variety of reef fish. The reef lines the inside of a gently curving cove that, under normal conditions, can be covered in a single hour-long dive. At its deepest points (60-80\'), one can often see harmless reef sharks napping on the sand. By swimming away from the reef into \"blue water\" at moderate depths (45-60\'), one can often seen grey reef sharks cruising. At the outset of the mating season (April / May), humphead parrotfish school here.