the system processes emotions. the safest inference would be these are animals that have highly elaborated emotional lives. it's becoming clear that dolphins and whales have a sense of self, a sense of social bonding that they've taken to another level, much stronger and much more complex than in other mammals including humans. we look at mass strandings, the fact that they stand by each other. everything about them is social, everything. it's been suggested that their whole sense of self is distributed among the individuals in their group. >> five of them. these orca are going to attack this sea lion.