Zanzibar occupies a peculiar position in the safari itinerary. For most operators it's the afterthought — three nights on the beach at the end of a Northern Circuit safari, a chance to lie still after a week in a Land Cruiser. This is understandable, but it misses what makes the island genuinely extraordinary: the reefs. Zanzibar's east coast sits at the edge of one of the most biodiverse marine environments on the Indian Ocean.
Mnemba Atoll, a 45-minute boat ride from the northeast coast, is protected as a marine conservation area and the reef around it is among the healthiest in East Africa. Green and hawksbill turtles nest on the inner beach. Spinner dolphins are essentially resident, circling the atoll in pods of 50 or more on most mornings. The coral itself — elkhorn, table, brain — is intact in a way that's increasingly rare. Visibility regularly exceeds 20 metres. The only caveat: it costs money to access properly. The atoll is leased by a private lodge, but day trips are available through a handful of operators and the conservation fee goes directly to reef management.
Chumbe Island is a different kind of experience. A 20-minute boat ride from Stone Town, it is one of East Africa's first privately protected marine reserves and the conservation credentials are serious. The reef is largely closed to fishing and has been for decades. As a result, it has recovered to something close to its pre-human-impact state.
The practical advice: build at least four nights into any Zanzibar extension. Two nights in Stone Town — the spice tour, the food market at Forodhani Gardens, the Old Fort — and two nights on the northeast coast for the reefs. The Nungwi and Kendwa areas have good access to Mnemba; the east coast at Paje has the best kite conditions in Africa if that's relevant.
