We are interested in neural mechanisms of social behavior and study electric fishes as a model system. Electric fishes generate and sense electric signals for their communication and active sensing. We address the following questions: (1) How the signal exchange can establish the social relationship among animals? (2) How does the brain process the communication signal and decide to produce the signal? (3) How does the brain regulate the coordination of electric signal generation and swimming behavior? We use a variety of techniques, including behavioral experiments, electrophysiology, and statistical modeling.