Bottlenose dolphins have long been admired for their playful nature and impressive aquatic acrobatics. However, recent research has shed light on a new behaviour exhibited by these intelligent marine mammals: scientists have discovered that dolphins “smile” at each other while playing.
A study conducted by researchers observed 22 captive bottlenose dolphins engaging in play, both with each other and with their human trainers. The findings revealed that the dolphins exhibited an “open mouth” expression during social play sessions, akin to a smile in human behaviour.
Analyzing 80 hours of video footage capturing 837 play sessions, the researchers noted that the dolphins specifically used the open mouth expression when interacting with fellow dolphins, rather than when playing with humans or alone. Out of 1,288 instances of the open mouth expression, a staggering 92 percent occurred during dolphin-dolphin play sessions, indicating its significance in their social interactions.
This discovery provides valuable insights into the complex communication and social dynamics of bottlenose dolphins, showcasing a fascinating aspect of their playful interactions. The research not only deepens our understanding of these charismatic creatures but also highlights the remarkable parallels between their behaviour and intricate social structures to that of humans.
As we continue to unravel the mysteries of the animal kingdom, observations like these serve as a reminder of the rich diversity of life on Earth and the extraordinary behaviours that exist beyond our own human experiences.