Tooth raking is a social behavior often done between dolphins. It is the act of scraping their blunt teeth against the skin of another dolphin. The frequent social squabbles of Risso's dolphins result in a complete change in coloration of the dolphin's skin from dark grey at birth to almost all white later in life. But the color change isn't all due to tooth raking. Risso's dolphins eat primarily squid and the beaks and tentacles of these cephalopods can also leave scarring! We see rake (tooth marks) on may species of dolphins including bottlenose, common dolphins, and even orcas! Photo by @chelseamayerphotography********