Question: do dolphins have finger prints ?

Valeria Senigaglia answered on 12 Jun 2012:

They have something similar. We use pictures of their dorsal fin to identify individuals. In fact they have nicks and notches on the trail of the dorsal fins that are individual specific, so only one individual can have that exact shape with that exact number and position of nicks and notches. Some species can also have specific coloration pattern or scars that we can use to identify them since they don’t change with time.