I believe this claim to be true. Although dolphins cannot form words like us humans can, they use different types of whistles that act as titles, or what we know as names. Stephanie King, lead author of the University of St. Andrews Sea Mammal Research Unit told Discovery News that, "animals produced copies when they were separated from a close associate and this supports our belief that dolphins copy another animal's signature whistle when they want to reunite with that specific individual." King also said that, "During the captures, the dolphins can't see each other, but can hear each other and continue to communicate." Therefore I believe the claim to be true, that dolphins can call each other by 'name.'