A name that circulates without a published record
Sinda appears on excursion listings for Dar es Salaam as one of the city’s island trips, usually alongside Makatumbe and Kendwa and usually described as the quiet alternative to Bongoyo. This page exists to say clearly what can and cannot be established about it, because the answer affects whether a day is worth committing to.
What was checked
The four gazetted island reserves off Dar es Salaam are Bongoyo, Mbudya, Pangavini and Fungu Yasin. They were gazetted separately in June 1975 and are managed together as the Dar es Salaam Marine Reserves. Their general management plan, adopted in 2005, is the only substantial published account of any protected island off this city — and it does not mention Sinda at all, in any section, including its inventories of reserves, islands and habitats.
Beyond that plan: the Marine Parks and Reserves Unit lists four protected areas in the country and its page for the Dar es Salaam reserves carries no information whatever. The Dar es Salaam City Council, Kigamboni Municipal Council and Temeke Municipal Council publish no tourism or heritage pages covering it. No national body reachable online publishes a description, an area, a boundary or access information for Sinda.
What that means in practice
It does not mean the island does not exist. It means that everything in circulation about it — the size, the reefs, the ruins, the wildlife, the snorkelling — rests on excursion marketing rather than on any authority, and none of it can be checked here. Under the rule this site works to, that is a reason to publish nothing rather than to repeat it.
The practical advice follows from the same fact. Sinda lies on the southern side of the harbour rather than north with the four reserves, so it is a different kind of trip from a Bongoyo or Mbudya day, with different departure points and different water. If someone offers you a Sinda excursion, three questions are reasonable before you pay: which island exactly, which protected area it falls inside and who collects the fee, and what the boat does if the weather turns. An operator who can answer all three is telling you something the published record cannot.
If what you want is an island day off the city with a documented reef, a known crossing and a published management plan behind it, the four northern reserves are the answer. See sandbank and island hopping and snorkelling.
Common questions
Is Sinda part of the Dar es Salaam Marine Reserves?
It is described that way in circulation. The reserves’ own management plan names four islands and Sinda is not among them. No authority reachable online resolves the question.
Why is there so little here?
Because there is so little published. A short page that says so is more use than a long one assembled from excursion listings.