EMT21 is an EMO BON observatory station operated by the Toralla Marine Science Station Centre of Marine Research (University of Vigo) in Spain. The sampling site is located in the Vigo Seamount (North Atlantic Ocean). Seawater samples are collected every two months and macrobenthos samples are collected twice a year. The sampling campaigns started in June 2021. All procedures follow the EMO BON Handbook. All EMO BON genomic data generated from the EMT21 observatory station will be included under this study.