For bottlenose dolphins (Tursiops truncates), they have similar “open mouth” facial expressions to convey ... would mimic the ...

New research of captive bottlenose dolphins (Tursiops truncates) indicates that they use an “open mouth” facial expression similar ... an intention to bite without making contact.

New research publishing October 2 in the Cell Press journal iScience shows that bottlenose dolphins (Tursiops truncates) use the “open mouth” facial expression—analogous to a smile—to ...

The smile, which is actually more of an open-mouthed expression ... mouth gesture likely evolved from the biting action, breaking down the biting sequence to leave only the 'intention to bite ...