The smallest, but easily the most spectacular, of the Tiran reefs, Thomas is home to steeply plunging walls that are lined with soft coral, schooling fish and patrolling sharks. Depth: surface to more than 40m. Rating: advanced. Access: boat.

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Lonely Planet's must-see attractions
 - 20.63 MILES - The waters surrounding this peninsula, 20km west of Sharm El Sheikh, are home to spectacular coral reefs, including the world-famous Shark and Jolanda… 
 - 11.74 MILES - One of the best dive sites in the area, Ras Um Sid features a spectacular gorgonian forest along a dramatic drop-off that hosts a great variety of reef… 
 - 25.58 MILES - The Dunraven sank in 1876 on its way from Bombay to Newcastle. Today the wreck, found at the southeast tip of Sha’ab Mahmud, is encrusted in coral and… 
 - 15.17 MILES - Thirty-five kilometres north of Sharm El Sheikh, Nabq is the largest coastal protectorate on the Gulf of Aqaba. Named after an oasis that lies within its… 
 - 23.05 MILES - This two-for-one special off the southern tip of Ras Mohammed is among the most famous dives in the Red Sea and rated one of the top five dives in the… 
 - 8.05 MILES - At the perennially popular Gardens there are actually three sites in one. Near Garden is home to a lovely chain of pinnacles; Middle Garden features a… 
 - 29.87 MILES - Turtles, leopard sharks and reef sharks are sometimes spotted zipping about the long outer reef wall here, which is encrusted with gorgonian corals. This… 
 - 10.35 MILES - A good choice for a drift dive, this dive site gets its name from an Ottoman shipwreck found here which was carrying a cargo of amphoras. Not much remains… 
Nearby Sharm El Sheikh attractions
3.23 MILES
This large reef is fantastic for sealife spotting with banner fish, parrot fish, cornet fish and blue-spotted sting rays all flitting through the hard…
7.56 MILES
Far Garden is home to the 'Cathedral’, a colourful overhang in deep water. Depth: surface to more than 40m. Rating: intermediate. Access: shore or boat.
8.01 MILES
Middle Garden reef features a fringing ridge that gently slopes down to a bed of sandy 'trails'. Depth: surface to more than 40m. Rating: intermediate…
8.05 MILES
At the perennially popular Gardens there are actually three sites in one. Near Garden is home to a lovely chain of pinnacles; Middle Garden features a…
8.36 MILES
Near Garden reef is home to a lovely chain of pinnacles. Depth: surface to more than 40m. Rating: intermediate. Access: shore or boat.
8.63 MILES
Home to sharks and large pelagic fish, Jackson Reef is crowned with the remains of a Cypriot freighter, the Lara, which ran aground here in 1985. Depth:…
9.84 MILES
The wide canyon here houses coral-covered pinnacles where you'll spot plenty of nudibranchs and flitting lionfish. This dive site is also known for chance…
10.35 MILES
A good choice for a drift dive, this dive site gets its name from an Ottoman shipwreck found here which was carrying a cargo of amphoras. Not much remains…