NEEMO is a NASA mission that sends groups of astronauts, engineers and scientists to live in Aquarius, the world's only undersea research station, for up to three weeks at a time. The Aquarius habitat and its surroundings provide a convincing analog for space exploration and for testing emerging technology and protocol for long duration space operations. Dawn Kernagis had the opportunity to join NEEMO as both a crew member and a researcher, living underwater for eight days with five other crew members. Dawn will provide an overview of the NEEMO 21 mission, including over a dozen mission objectives ranging from telemedicine to robotics to workload assessment. Dawn Kernagis was recently awarded the 2018 Young Scientist/Medical Doctor Award presented by the Undersea and Hyperbaric Medical Society.