The anchorage is well off the island on the northeast side in 10 metres on a hard bottom. It is not suitable for overnight stays. This island, at the northern end of the group, away from the worst of the riverine sediment from the west, has reasonable coral formations in limited visibility.
Rocks in the water
Between Koh Mae Ko and Koh Hanuman (aKa Koh Ao Raet or Sphinx Island) there is a sharp point of rock just beneath the surface which is only visible at extreme low tides.