We have been developing the jellyfish Clytia hemispherica as a model organism to study the neural control of behavior and nervous system evolution. Here, I will present our observations on Clytia's surprisingly rich repertoire of swimming behaviors. I will then describe recently established genetic tools that allow us to image population-level neural activity in living animals. Lastly, I will present preliminary analyses of how neural activity is organized in the jellyfish nervous system, including how activity in distinct neural subpopulations correlates with aspects of swimming. Looking forward, Clytia presents an exciting platform for high-resolution studies of the neuromuscular control of behavior.