||Straße von Gubal
* Difficulty: 2
* Current: 1 to 2
* A varied underwater environment rich in different fauna.
* A calm site with few divers.
* The chance to see leopard sharks.
* Check the direction of the current before your dive.
* If the current is strong and running northwards, do not dive, especially if you do not have a dinghy.
The long, half outcropped coral reef runs from northwest to southeast, which constitutes the impressive Sha'ab Mahmud and separates a broad sandy lagoon from the open sea, is breached by two channels known as Small Crack (or Small Passage) and Big Crack (or Big Passage). Small Crack, called Fossma Saghir by local fishermen, is the more southerly channel. Its central body is divided by a large coral formation into two secondary channels from 5 to 8 meters deep with tidal currents that can become extremely strong. When the tide is flowing and the current it generates moves northwards, you are pushed from the lagoon towards the open sea. If, on the other hand the tide is ebbing, the current runs south towards the lagoon: it is therefore preferable to dive at this time, to enable you to drift back to your boat, moored inside the lagoon. Obviously a dinghy would be ideal for dives in Small Crack. On the outer reef wall, which descends to a 18-22- metre deep sandy floor, you will see gorgonians, alcyonarians and large acroporidae. Often there are sea turtles; leopard sharks and white tip reef sharks may sometimes be seen. In the summer there are schools of barracuda and jackfish and, near the mouth of the channel, a school of doublebar breams (genus acanthopagrus). Inside the northern channel there is an abundance of fire corals (millepora dichotoma), which are typical of this areas, with strong currents