The Symbiosis in Aquatic Systems Initiative is pleased to announce a new collaboration with the Wellcome Sanger Institute to sequence the genomes of 1,000 freshwater and marine organisms involved in aquatic symbioses where at least one partner is a microbe. The Aquatic Symbiosis Project seeks to provide the genomic foundations needed by scientists to answer key questions about the ecology and evolution of aquatic symbioses. The goals of this project are to create essential research infrastructure and to build community across aquatic symbiosis researchers. Phase One of the Aquatic Symbiosis Genomics project has linked the Sanger research team with four international teams of collaborators who bring their expert knowledge in symbiosis to the project. The four team leads are: Dr. Ute Hentschel Humeida (GEOMAR Helmholtz Centre for Ocean Research, Germany): Sponges as symbiont communities, Dr. Jose Victor Lopez (Nova Southeastern University, USA): Photosymbiosis in marine animals, Dr. Michael Sweet (University of Derby, UK): Coral symbiosis sensitivity to environmental change, Dr. John Archibald (Dalhousie University, Canada): Evolution of new symbioses in single-celled eukaryotes. Phase Two is now open for applicants to propose additional organisms for sequencing. For more information, including FAQs, the list of organisms currently in the sequencing queue, and a link to the application, please visit the Aquatic Symbiosis Project website. Applications are due November 1, 2020.