Ethical Dolphin Tours: How to Spot a Chase

So how do you know if an ethical dolphin tour is really ethical? Watch what the boat does when the dolphins move away. If it slows down and lets them go, that is a good sign. If it speeds ahead to put swimmers in their path again, it is a chase, whatever the brochure says. This is for anyone choosing a dolphin trip, from Hawaiʻi to Zanzibar. You do not need to be an expert. You only need to know what to watch for.

The moment that tells you everything

A website can promise respect in beautiful language. What matters is one small moment on the boat.

When the dolphins change direction, does the skipper slow down and leave them a clear route? Or does the boat speed ahead to drop swimmers in front of them again? The second option is a chase, even if the guide calls it a “gentle drop” and nobody on board uses the word.

This is not always easy to see as a guest. The boat is moving, people are excited, and a single approach can look harmless. The problem is repetition. The same pod, met by many boats, many times a day, often in the hours when the animals most need quiet.

Why do dolphins need quiet hours during the day?

Spinner dolphins in Hawaiʻi feed at night and rest in shallow bays during the day. In a study of four resting bays on Hawaiʻi Island, the dolphins spent about 61.7% of daylight hours resting.

The researchers did not see immediate changes in behaviour. But they warned that constant disturbance could lead to a lack of rest, to dolphins being pushed out of their favourite bays and, in the end, to effects on the population.

Because of this kind of evidence, NOAA Fisheries adopted a rule in Hawaiʻi. It is illegal to swim with, approach or remain within 50 yards (45.7 m) of a Hawaiian spinner dolphin. If a dolphin approaches you, you must make no effort to engage or follow it, and you must move away. You can meet these dolphins properly on our spinner dolphin page in the Ocean Atlas.

What boats do to a pod

Off Réunion Island, researchers watched spinner dolphins with and without boats nearby. When boats were there, the dolphins rested and socialised less, and travelled and milled around more.

The dolphins avoided boats more when there were more of them, and when boats did not follow the local guidelines. Not following them meant things like coming closer than 50 m, too many boats around one group, staying too long, and crossing the dolphins’ path or circling them.

A closer look at Zanzibar

The south coast of Zanzibar, around Kizimkazi, is famous for dolphin trips. It is also a place where kind sales words alone tell you very little.

Researchers there compared groups of Indo-Pacific bottlenose dolphins with and without tourist boats. With boats present, the dolphins were less likely to keep resting or socialising, and more likely to start travelling. Feeding, resting and socialising all went down, and travelling went up. The authors concluded that the level of tourism at the time was affecting the dolphins’ behaviour, and that rules were urgently needed.

That study is now more than fifteen years old, and it should not be stretched into a claim about every boat or every species. I mention it because it describes, carefully, what a chase does to a group of animals. Ocean Calling has not verified any Kizimkazi operator to recommend.

Questions that reveal how a boat behaves

Ask whether the boat follows a pod after it moves away, and how many attempts it makes. Ask whether passengers enter the water, and which local law or permit allows that. Ask how many boats usually gather around the same group, and what the skipper does when that number grows.

Then listen carefully to the answers. If the reply is “the dolphins can always leave”, ask what the boat does when they try. A good guide will accept a day without a close approach, and will tell you so before you leave the harbour.

What a quiet watch looks like

The choice we would make is a quiet, lawful watch with a guide who is willing to stop. A slow approach. The engine in neutral when dolphins are close. No crossing their path, circling them or driving ahead of the group. A clear limit on time, and leaving when the animals move away. Wildlife encounters are unpredictable. Dolphin watching should always follow local regulations and experienced professional guidance.

In the water, where swimming is legal, it means letting the dolphins decide, and never chasing, touching or feeding them.

On days like this I keep my phone in a small roll-top dry bag, so I am watching the dolphins and not my screen.

Choose the boat’s behaviour, not its adjective. It is the same thing we look for in every boat and guide on our ocean retreats.

Questions people ask

Wildlife encounters are never guaranteed and never forced. Ocean Calling works only with vetted, ethical local operators, and every animal is free to approach, or not, entirely on its own terms.