Critters Alley - Mafia Island
Hogwarts, or Outback as some call it, is a proper drift dive, way out from the Bazaruto main islands, about a 45-minute boat ride. We’ve found the average visibility to be around 12 metres, so it’s not always gin-clear, but that just adds to the atmosphere. The reef top sits around 22 metres, dropping to a maximum of 26 metres, so it's one for those comfortable with a bit more depth. What makes Hogwarts special are the cleaning stations. We’ve had incredible encounters watching both giant and reef mantas circle through, patiently waiting their turn. It’s a hypnotic display; you really feel like you’re observing something intimate. Beyond the mantas, keep an eye out for green turtles gliding past, and if you’re lucky, a frogfish or two hunkered down on the coral. The garden eels are a fun watch, always retracting back into the sand as you drift by. Then, at the end of the drift, you’re treated to some big swim-throughs – always a good way to finish a dive. This site suits divers who appreciate a good current, are comfortable at depth, and crave those larger pelagic interactions, especially the mantas.
- Location
- Mafia Island, Tanzania, Indian Ocean & East Africa
- Coordinates
- -7.973200, 39.750100
- Type
- reef
Marine Protected Area: Mangrove
Best Time to Dive in Mafia Island
The warmest water temperatures in Mafia Island occur in January, averaging 28.8°C. The coolest conditions are in December at 28.8°C.
Monthly Water Temperatures
- January: 28.8°C (air: 27.8°C)
- February: 28.8°C (air: 28.0°C)
- March: 28.8°C (air: 27.8°C)
- April: 28.8°C (air: 27.0°C)
- May: 28.8°C (air: 26.9°C)
- June: 28.8°C (air: 26.0°C)
- July: 28.8°C (air: 25.2°C)
- August: 28.8°C (air: 25.0°C)
- September: 28.8°C (air: 25.3°C)
- October: 28.8°C (air: 26.1°C)
- November: 28.8°C (air: 27.0°C)
- December: 28.8°C (air: 27.7°C)
Nearby Dive Sites in Mafia Island
- Bwejuu Wall (wall)
- Bwejuu Wall (wall)
- Chekechea (reef)
- Chole Reef North (reef)
- Coral Gardens (reef)
- Coral Islands (reef)
- Corinne’s Reef (reef)
- Cryptomania (reef)
- Dindini Wall (wall)
- Hulls Rock (reef)
- Jina Wall (reef)
- Juani North (reef)
- Juani South (wall)
- Kasa (cave)
- Kinasi Pass (drift)
Nearest Dive Centres to Critters Alley
- Action for Oceans Eco Dive - ["PADI"]
- Blue World Diving - ["PADI"]
- Mafia Island Diving ltd - PADI
Marine Life in Mafia Island
Home to 165 recorded species including 94 hard corals, 63 reef fish, 3 sharks & rays, 2 jellyfish, 1 other, 1 whales & dolphins.
Notable Species
- Green Turtle (Chelonia mydas)
- Allison's Tuna (Thunnus albacares) - Reef Fish
- Whale Shark (Rhincodon typus) - Sharks & Rays
- Stripy (Katsuwonus pelamis) - Reef Fish
- Bigeye tuna (Thunnus obesus) - Reef Fish
- Bullet Mackerel (Auxis thazard) - Reef Fish
- Tuna (Thunnus alalunga) - Reef Fish
- Sperm Whale (Physeter macrocephalus) - Whales & Dolphins
- Tail-spot Squirrelfish (Sargocentron caudimaculatum) - Reef Fish
- Cauliflower coral (Pocillopora verrucosa) - Hard Corals
- Smooth cauliflower coral (Stylophora pistillata) - Hard Corals
- Stony coral (Porites cylindrica) - Hard Corals
- Stony coral (Porites lutea) - Hard Corals
- Larger star coral (Favites pentagona) - Hard Corals
- Staghorn coral (Acropora aspera) - Hard Corals
- Staghorn coral (Acropora listeri) - Hard Corals
- Birdsnest coral (Seriatopora caliendrum) - Hard Corals
- Thin birdsnest coral (Seriatopora hystrix) - Hard Corals
- Staghorn coral (Acropora polystoma) - Hard Corals
- Closed brain coral (Leptoria phrygia) - Hard Corals
Recommended Packing List for Critters Alley
Based on average water temperature of 28.8°C.
- Shorty or Rashguard - warm 29°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