Dolphins typically whistle to each other underwater, through a special structure just beneath their blow holes.
SailHawaii.com
Researchers say the sounds have meaning. For example, each dolphin learns its own signature whistle from its mom. So in human terms, when they greet each other, they include not just a "hello" but their name as well. Video from Wild Side Specialty Tours cruise.
awww that was so cute :)
itsmelizzyr 10 months ago