Researchers still don't know what the open-mouth facial expression means or whether it's akin to smiling in humans—but ...

Dolphins are extremely playful, but little is known about how they—and other marine mammals—communicate during playtime. New ...

A new study suggests that the animals perform ‘open mouth displays’ when they are in front of a playmate, an expression that ...

Excessive tourism is killing dolphins off the coasts of Jeju Island, according to marine scientists and environmental ...

Bottlenose dolphins “smile” at each other while playing, reveals new research. The "open mouth" expression probably evolved ...

Biologists from the University of Pisa have found that bottlenose dolphins use a smile-like face to say they want to play together.

Dolphins are among the most playful and social animals on Earth, yet we don’t know much about how they communicate during games and other more light interactions. New research of captive bottlenose ...

Dolphins are extremely playful, but little is known about how they—and other marine mammals—communicate during playtime. New ...

Zoomarine, Italy Bottlenose dolphins “smile” at each other while playing, making open-mouth facial expressions that are similar to those used by other animals, new research suggests.