Big Wall

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What you'll see (21)

Pacific TrumpetfishAulostomus chinensisseen 24× near here

Skunk AnemonefishAmphiprion akallopisosseen 23× near here

Three-spot DascyllusDascyllus trimaculatusseen 21× near here

Geometric MorayGymnothorax griseusseen 21× near here

Indo-Pacific Sergeant MajorAbudefduf vaigiensisseen 17× near here

Guineafowl PufferArothron meleagrisseen 16× near here

Blacklip ButterflyfishChaetodon kleiniiseen 16× near here

Moorish IdolZanclus cornutusseen 15× near here

Loch's ChromodorisChromodoris lochiseen 15× near here

Allard's AnemonefishAmphiprion allardiseen 13× near here

Lyretail AnthiasPseudanthias squamipinnisseen 12× near here

Day OctopusOctopus cyaneaseen 11× near here

Powder Blue TangAcanthurus leucosternonseen 11× near here

Palette TangParacanthurus hepatusseen 11× near here

Scissortail SergeantAbudefduf sexfasciatusseen 10× near here

Palenose ParrotfishScarus psittacusseen 10× near here

Freckled HawkfishParacirrhites forsteriseen 10× near here

Indian Bullethead ParrotfishChlorurus sordidusseen 10× near here

Indian Redfin ButterflyfishChaetodon trifasciatusseen 9× near here

Small Giant ClamTridacna maximaseen 9× near here

Indian LionfishPterois milesseen 9× near here

Planning a trip

8–12 days

worth going for

Long haul, usually two flights.

7,194km from Singapore — about 24h each way, so two of those days are travel. 7 dive sites within 25km.

When people dive it

Busiest Feb, Jul, Aug, Oct.

From 3,334 logged sightings — when divers are in the water, which is not quite the same as when visibility is best.

Dive Crew is a dive group from Singapore. Members plan trips here, log their dives, and share their photos of each site.

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Moon and tides

Waning gibbous

71% lit · day 20 of the lunar month

Neap tides

Neap tides — the smallest range of the month, so the weakest currents. Easy conditions and usually the clearest water, though a drift site may barely drift.

New 10 Oct Full 26 Oct

Phase computed here, not fetched. This is the spring/neap cycle, which sets how hard the water moves — not a tide table: no free source publishes high and low water for Southeast Asian reefs, and the range peaks a day or two after the moon does, by an amount that varies with the coast. For times on the day, ask the operator.

Getting there

~13h 57m

door to water, each way · 4 legs

FlightZanzibar (ZNZ)~12h 9mFlight time plus the airports at both ends. A connection adds to it.Find flights →
Transferthe jetty~21 minRoad transfer to the coast, usually arranged by the resort or liveaboard.Directions →
Ferrythe crossing~57 minAt this distance the last stretch is a scheduled crossing rather than a dive boat, so book it before the flight — a missed sailing usually costs a day. Which crossing it is has been worked out from the distance and not from a timetable; ask the operator.
Dive boatBig Wall~30 minThen the dive boat out from the island.

📍 Big Wall on Google Maps 🧭 Route from Zanzibar

Times marked ~ are estimated from straight-line distance and will be roughly right at best. The road legs are the ones Google Maps answers properly; it will not plan the ferry or the dive boat at all. A dive site's coordinates put a pin in open water, so the map link drops you on the site, not on a jetty.

Details

Island: Unguja
Country: Tanzania
Marks: 5°48.090'S 39°25.096'E
Position: -5.8015, 39.4183

Where it is

Loading the map…

Nearby

Sightings and photographs from iNaturalist contributors, research-grade records within 6km, under Creative Commons licences. Counts are what divers and snorkellers have bothered to log — a common fish with few records is common all the same.