Conservation genomics in Northen Hemisphere blue whales to test for multiple subspecies and their genomic viability. Samples provided by the NOAA Southwest Fisheries Science Center MMaSTR Collection, La Jolla, California, USA. Study conducted by: 1.) Senckenberg Biodiversity and Climate Research Centre (BiK-F), Frankfurt am Main, Germany 2.) LOEWE-Centre for Translational Biodiversity Genomics (TBG), Senckenberg Nature Research Society, Frankfurt am Main, Germany 3.) Institute for Ecology, Evolution and Diversity, Goethe University, Frankfurt am Main, Germany Funded by by the Centre for Translational Biodiversity Genomics through the program "LOEWE - Landes-Offensive zur Entwicklung Wissenschaftlich-oekonomischer Exzellenz" of Hessian's Ministry of Higher Education, Research and the Arts.