Of all the wildlife encounters Zanzibar has to offer, diving and swimming with dolphins is the one that stays with you forever. The Indian Ocean around Zanzibar is home to several resident dolphin species — and if you know where to look, encounters are remarkably frequent.
But there’s a right way and a wrong way to experience dolphins in the wild. As a marine conservation volunteer on our Zanzibar marine programme, you’ll do it the right way — contributing to real research while having the experience of a lifetime.
Which Dolphins Will You See?
Zanzibar’s waters are home to several dolphin species, most notably:
- Indo-Pacific bottlenose dolphins — the most commonly seen species, often found in large pods near the southern tip of Unguja (Zanzibar’s main island)
- Spinner dolphins — named for their spectacular aerial spins, these are often spotted further offshore
- Humpback dolphins — shyer and less frequently seen, but a special sighting when they appear
The waters around Kizimkazi, on the southern coast, are particularly well known for resident bottlenose and spinner dolphin populations that return to the same bays day after day.
What Does Ethical Dolphin Swimming Look Like?
This is where conservation volunteering makes a real difference. Much of the tourist dolphin-watching industry in Zanzibar has come under scrutiny for practices that stress and disturb dolphin pods — boats chasing animals, swimmers dropping into the water directly on top of them, and no regulation of group sizes or interaction times.
As a volunteer with our Zanzibar conservation programme, your interactions are guided by science and ethics:
- Dolphins are never chased or cornered
- Entries into the water are calm and controlled
- Interactions only happen when dolphins approach on their terms
- You’ll spend time observing and recording behaviour rather than just swimming
- Data you collect feeds directly into population health studies
The result? Encounters that feel genuinely wild — because they are. When a dolphin chooses to swim alongside you out of curiosity rather than being forced into proximity, it’s a completely different experience.
What Will You Actually Be Doing?
Your dolphin research work as a volunteer will include:
- Photo-ID surveys — using the unique markings on dorsal fins to identify individual dolphins and track pod membership over time
- Behaviour logging — recording feeding, socialising, resting, and travel behaviours to build a picture of how the population uses different areas
- Acoustic monitoring — some programmes use hydrophones to record dolphin vocalisations and study communication patterns
- Population counts — tracking pod sizes over time to monitor whether populations are stable, growing, or declining
This isn’t just snorkelling with dolphins. It’s science. And the data you collect forms part of a long-term record that helps conservationists understand and protect these animals for the future.
Do You Need to Be an Experienced Diver?
Not at all. Much of the dolphin monitoring work happens from boats and at the surface — so strong swimming ability and snorkelling confidence is all you need to get started. If you want to get your PADI Open Water certification while you’re there, that can usually be arranged as part of or alongside your volunteer programme.
The Moment You Won’t Forget
Ask any volunteer who’s been to Zanzibar what their highlight was, and most will describe a moment in the water when a dolphin broke away from the pod, made eye contact, and lingered. No boat engine. No shouting. Just the sound of the ocean and the impossible feeling that this wild animal chose to spend a few seconds with you.
That’s what ethical wildlife volunteering feels like. And it’s available to you right now.
Find out more about our Zanzibar dolphin research programme and take the first step toward your own unforgettable encounter.
