Molecular characterization of deep-sea bathymodiolin mussels and gill symbionts from the U.S. mid-Atlantic margin

These datasets provide geographic sampling information for Bathymodiolin mussels collected from three cold seep sites off the mid-Atlantic U.S. coast, northwestern Atlantic Ocean. Also included are GenBank accession numbers for mitochondrial gene sequences (COI and ND4) and sequence alignments (File1_mussels) used in phylogenetic analyses for molecular identification of the mussel species. Additionally, GenBank accession numbers for the BioProject containing 16S metabarcoding sequence data used to identify gill symbionts in mussels are provided, along with supporting details for the analyses performed on the 16S metabarcoding data (File2_Symbionts).