marsa alam | red sea | egypt
elphinstone reef
A legendary offshore finger reef exposed to open-sea currents, world-famous for oceanic whitetip encounters, hammerheads, and breathtaking drop-offs draped in vibrant soft corals.
40 m
dive depth
600 m
REEF LENGTH
11 km
OFFSHORE
ADVANCED
LEVEL
OVERVIEW
THE PELAGIC MAGNET
Elphinstone Reef (Sha’ab Abu Hamra) is a cigar-shaped reef rising from the deep open sea, located 11 km east of the Egyptian coastline and 26 km north of Marsa Alam. With its long, narrow profile running almost precisely north-to-south, it acts as a massive barrier to open-ocean currents. These nutrient-rich flows fuel spectacular biodiversity and attract large pelagic predators.
The main reef stretches approximately 450 metres (600 metres including its extended underwater plateaus) and features sheer vertical walls plunging past 100 metres. Due to its proximity to the mainland, it is heavily frequented by both day-trip speedboats and liveaboards, meaning multiple vessels often share the southern mooring lines. Below the southern end lies its most notorious feature: the deep underwater “Arch”—a 10-metre-high natural tunnel connecting the east and west walls at depths well beyond recreational limits.
KEY FEATURES
WHAT DEFINES ELPHINSTONE
Oceanic Whitetip Hub
One of the premier spots globally to dive with curious Oceanic Whitetips (Longimanus), which frequently patrol the southern plateau and mooring lines.
The Deep Arch
A massive 10-metre-high natural tunnel cutting through the southern plateau at 50–60 metres—strictly a technical dive that has claimed the lives of untrained recreational divers.
Northern Plateau Ledges
A dramatic plateau dropping in steps to 40 metres before forming a deep cleft and plunging over a second ledge at 60 metres. A prime shark hotspot.
Gorgonian Gardens
The deep walls and southern plateau are densely carpeted with giant gorgonian sea fans, soft alcyonarian corals, and black coral bushes.
The Shark Protrusion
A distinct physical shelf at the tip of the northern plateau where schooling hammerheads and grey reef sharks gather to face the oncoming current.
High-Velocity Currents
Powerful, highly variable currents running primarily north-to-south act as the engine driving the exceptional pelagic activity.
MARINE LIFE
SHARKS, PREDATORS & THE WALLS
The convergence of open-sea currents around an isolated seamount creates conditions found nowhere else – a magnet for both reef species and the open-water giants that chase them.
DIVE ROUTES
FOUR WAYS TO EXPLORE THE REEF
Currents heavily dictate operations here. Divers are typically dropped at the northern or mid-reef sections by RIB (Rigid Inflatable Boat) and drift with the flow back to the southern moorings.
Northern Plateau – Eastern Side
Ideal for early morning. Dropped by RIB over the deep northern tip. If currents allow, descend to 35–40 metres on the plateau to scan the blue for hammerheads. Return south keeping the reef wall on your right shoulder back to the boat.
Southern Plateau & Moorings
Enter directly from your moored liveaboard or day-boat. Explore the scenic, gently sloping southern plateau. Keep a sharp lookout into the blue for curious longimanus sharks circling beneath the boat hulls. Avoid drifting too far past the shelf into open water.
Northern Plateau – Western Side
Dropped by RIB at the northern plateau. Instead of heading to the deepest tip, immediately follow the steep western wall southward with the reef on your left shoulder. Highly recommended for afternoon dives due to optimal sunlight penetration illuminating the soft corals.
East Wall Drift
Dropped mid-reef on the eastern wall during favorable currents. Drift rapidly southward along a sheer vertical drop-off densely packed with massive gorgonian fans. Scan the open water for passing pelagics like tuna and barracuda before hooking around to the southern plateau.
DIVING CONDITIONS
Water & Visibility
VISIBILITY
30 - 50 m
Phenomenal deep-water clarity, optimal during summer months
WATER TEMPERATURE
23 - 29° C
23–24° C winter · 27–29° C summer
RECOMMENDED LEVEL
Advanced Open Water
Experienced Diver
Strong, sudden currents and open-ocean conditions; minimum 50 logged dives required.
ACCESS
Liveaboard or Day Boat
Accessible via overnight liveaboard safaris or day boat/speedboat excursions out of Marsa Alam or Port Ghalib.
TIPS & HAZARDS
DIVE SAFE AT ELPHINSTONE
The Arch is strictly off-limits
The famous southern tunnel sits far below recreational diving limits. Do not attempt to dive it; it requires advanced technical certifications and mixed gases.
Watch the downcurrents
The narrow northern tip is notorious for current splits that can suddenly push divers downward. Monitor your depth gauge closely.
No night diving allowed
Due to highly volatile open-sea currents, lack of physical shelter, and predatory shark activity, night diving is strictly banned at this site.
Deploy your DSMB early
If you lose the reef or get swept out into the blue, immediately deploy your Delayed Surface Marker Buoy so safety RIBs can track your drift.
Maintain space with Oceanic Whitetips
Longimanus sharks at the southern moorings are famously bold and curious. Keep close to the reef structure, maintain eye contact, and never make sudden erratic movements if they approach.
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