Small Wall, Mnenba Island - Zanzibar & Pemba

Tres Cocos Canyons is one of those easy-going Ambergris Caye dives that always delivers, especially if you catch it on a calm day. We love the drift here, usually a gentle push from the north, guiding you through these big, sandy canyons lined with massive coral formations. You'll see plenty of Boulder Brain Coral and Ridged Cactus Coral, forming walls that feel surprisingly intimate. It’s ideal for newer divers, but even seasoned folks enjoy cruising along, spotting Green Turtles munching on seagrass or a curious Gulf Toadfish peeking from a crevice. Keep an eye out for larger pelagics too; being so close to the reef cut means dolphins occasionally pass by, and we’ve had some great encounters with spotted eagle rays gliding over the sandy bottoms. The visibility hovers around 19m, making it a comfortable dive for photography without feeling overwhelming. This site is perfect for a relaxed afternoon drift, where you can simply enjoy the slow pace and the subtle shifts in the reef.

Location: Zanzibar & Pemba, Tanzania, Indian Ocean & East Africa
Coordinates: -5.831800, 39.385600
Type: reef

Marine Protected Area: Maziwe Island

Best Time to Dive in Zanzibar & Pemba

The warmest water temperatures in Zanzibar & Pemba occur in January, averaging 28.1°C. The coolest conditions are in December at 28.1°C.

Monthly Water Temperatures

January: 28.1°C (air: 27.5°C)
February: 28.1°C (air: 27.9°C)
March: 28.1°C (air: 27.7°C)
April: 28.1°C (air: 26.1°C)
May: 28.1°C (air: 26.1°C)
June: 28.1°C (air: 25.4°C)
July: 28.1°C (air: 24.8°C)
August: 28.1°C (air: 24.9°C)
September: 28.1°C (air: 25.4°C)
October: 28.1°C (air: 26.2°C)
November: 28.1°C (air: 26.7°C)
December: 28.1°C (air: 27.3°C)

Nearest Dive Centres to Small Wall, Mnenba Island

Marine Life in Zanzibar & Pemba

Home to 331 recorded species including 266 reef fish, 14 sea snails & nudibranchs, 10 seagrass & algae, 8 hard corals, 8 sharks & rays, 7 sea cucumbers.

Notable Species

thalassia (Thalassia hemprichii) - Seagrass & Algae
Green Turtle (Chelonia mydas)
Species code: Tc (Thalassodendron ciliatum) - Seagrass & Algae
halodule (Halodule uninervis) - Seagrass & Algae
cymodocea (Cymodocea rotundata) - Seagrass & Algae
Humpbacked conch (Gibberulus gibberulus) - Sea Snails & Nudibranchs
cowry (Monetaria moneta) - Sea Snails & Nudibranchs
cloth-of-gold cone snail (Conus textile) - Sea Snails & Nudibranchs
Golden-Yellow Cone (Conus flavidus) - Sea Snails & Nudibranchs
Rock Cod (Cephalopholis boenak) - Reef Fish
Brown Frillfin (Bathygobius fuscus) - Reef Fish
Long-beaked Dolphin (Stenella longirostris) - Whales & Dolphins
Cigar wrasse (Cheilio inermis) - Reef Fish
Species code: Hs (Halophila stipulacea) - Seagrass & Algae
Sand-dusted Cone (Conus arenatus) - Sea Snails & Nudibranchs
Pronghorn Spiny Lobster (Panulirus penicillatus) - Crabs & Lobsters
Grouper (Epinephelus areolatus) - Reef Fish
Coelacanth (Latimeria chalumnae)
Sea lettuce (Ulva lactuca) - Seagrass & Algae
Pufferfish (Arothron hispidus) - Reef Fish

Recommended Packing List for Small Wall, Mnenba Island

Based on average water temperature of 28.1°C.

Shorty or Rashguard - warm 28°C water needs minimal exposure protection
Mask - essential for every dive
Fins
BCD - buoyancy compensator
Regulator - your most safety-critical piece of gear
Dive Computer - tracks depth, time, and NDL
Surface Marker Buoy (SMB) - essential for boat pickups
Dive Torch - useful for crevices and colour at depth
Underwater Camera - capture your diving memories