Lonely Mushroom is a single pinnacle located between the Dunraven and the Alternatives. The pinnacle looks like, as the name already implies, like a mushroom - slightly narrow at the bottom with a flat exposed flat cap area at around 3 metres - the Zodiacs tend to drop you off right on top it.
The bottom of the mushroom is around 15 metres making it an easy dive, even if there is a slight current. The mushroom has a a number of small coral rock formation within easy swimming distance to the north, allowing you to explore other areas once you had enough of the mushroom.
The north side is covered in less life, while the south side of the reef is covered with soft corals and other typical reef inhabitants. The mushroom is surrounded by a sandy bottom which extend towards the south, where it splits into two sandy run-offs. The drop near the edge is quite steep and the reef drops away quickly to 30 metres and more. Based on the shipping maps and dive boat sonar, the depth quickly extends to over 200 metres. In the past we had been lucky to see larger fish swim past on their way towards Ras Mohammed by waiting on the drop off.