Bottleneck Cave, located at the west of Reqqa Point, drops down from 37 meters to 58 meters. The entrance hole is in the reef at 37 meters, just large enough to swim through. The vertical tunnel takes the shape of a cylinder about 5 meters in diameter. Along the walls of this cave there are many cracks and fissures inhabited by all types of shrimp. At the deep end of the sloping, sandy floor there is a narrow tunnel spectacularly leading out of the chimney to the bottom of the cliff. Looking up from this depth towards Reqqa Point is breathtaking.