The dolphin was discovered at Svendborg Sound in 2019 and the locals call him Delle. He is far from areas that are common for his species, writes Livescience.
The researchers were curious about how the solitary dolphin affected the porpoises in the sound and sent down a recording device. They were pleasantly surprised and astonished by how much Delle talked: during 69 days, over 10,833 sounds were recorded – including many that dolphins use to communicate.
One theory is that the dolphin talks to himself because he feels lonely. It could also be that Delle makes sounds due to unconscious emotional signals.
It's like how we humans sometimes laugh when we read something funny, even if no one else is around, says researcher Olga Filatova according to Livescience.
Other dolphin researchers emphasize that sound is an important part of most of these animals' behaviors. The researchers hope that the study can be used to understand more about dolphins' behaviors and emotions.
