10/09/2026
Daily Sightings – September 10th, 2026
✅ Bryde’s whale
✅ Bottlenose dolphins
✅ Common dolphins
✅ Atlantic spotted dolphins
Did you know that dolphins can have best friends? Yes, you read that right! Dolphins live in what is known as a fission-fusion society, where groups are very fluid and dynamic, constantly changing in size and composition over relatively short periods of time.
There is, of course, a biological reason for this social flexibility: moving between groups can help reduce competition for resources and increase genetic mixing within the population. But some dolphins still seem to have preferred companions and regularly travel between groups together.
Today, for example, we encountered one of the most frequently sighted bottlenose dolphin groups in São Miguel: Andy’s Group, with around 70 known individuals. Within the group, two individuals we know as Heart and Sparkle have been seen together around 80% of the times, according to our data. Definitely best friends! 🐬
Similar patterns have been observed in other parts of the world, where genetic analyses have shown that dolphins who consistently associate with each other are not necessarily genetically related. So, while we can’t prove that Heart and Sparkle are best friends, we certainly have no reason to think otherwise!
📸 Photos by Andreia Pereira, Catarina Barata and Valeria Idárraga
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