Magnetotactic bacteria (MTB) are a group of prokaryotes that generally live dominantly at or just below the oxic-anoxic transition zone (OATZ) in diverse aquatic environments. They biomineralize intracellular magnetic nanocrystals magnetite (Fe3O4) or/and greigite (Fe3S4) each enveloped by bilayer membrane, called magnetosome, and often organized into chain chains. Here, we identify new magneto...