This project collects the sequencing data and assemblies generated for Flabelligera commensalis, common name marine annelid worm, to facilitate genome assembly and annotation as part of the Aquatic Symbiosis Genomics (ASG) Project (https://www.aquaticsymbiosisgenomics.org/) from samples supplied by the ASG Hub (https://www.aquaticsymbiosisgenomics.org/collaborators/bacterial-symbiosis-as-an-adaptation-to-extreme-environments-in-annelid-worms/). The data under this project are made available subject to the Tree of Life Open Data Release Policy (https://www.darwintreeoflife.org/project-resources/).