Dolphins ‘Smile’ When They Play Together, Research Footage Reveals

<img width="1500" height="1000" src="https://gizmodo.com/app/uploads/2024/10/Playing-dolphin.jpg" alt="Playing Dolphin">Researchers have found that bottlenose dolphins make a distinct open mouth gesture when playing with other dolphins, similar to how humans smile and laugh with each other.

https://gizmodo.com/dolphins-smile-when-they-play-together-research-footage-reveals-2000506217