Reef walking is a great way to explore areas of reef uncovered at low tide. You can interact closely with the marine environment and discover a variety of marine plants and animals.The waters around Singapore, contrary to popular belief, are still teeming with marine life. A suitably low tide and a pair of sturdy shoes or booties is all we need to go exploring on this reef walk.The intertidal zone is the area along the shore that is usually submerged at high tide and becomes exposed at low tide.