Brain anatomy of manta rays and increasing number of behavioral observations indicate that they are more social animals than it was previously thought. Instead of being solitary, they often interact with each other at feeding aggregations and cleaning stations but most likely other occasions as well when scuba divers are not able to observe them. One of the goals of the Manta Cognition Project is to identify communication signals that manta rays use between each other and potentially with other species (e.g. cleaner fish). Many aspects of inter- and intraspecific communication has been documented during my last research period at the Atlantis Aquarium, Bahamas. The huge amount of video recordings is still being analyzed. Most of social animals that need each other in order to improve their survival also possess a strong emotional communication behavior, which was -in case of these captive manta rays- reflected by specific cephalic fin movements and intense coloration changes that was documented first time ever on manta rays. More details are coming soon!