Paraskevi Nomikou, National and Kapodistrian University of Athens, Athens, Greece, Lori L Summa, Rice University, Houston, TX, United States, Peter Vrolijk, New Mexico Institute of Mining and Technology, Socorro, NM, United States, Richard Camilli, Woods Hole Oceanographic Inst, Woods Hole, MA, United States, Deborah Smith, Schmidt Ocean Institute, Palo Alto, CA, United States and Falkor 101218 Science Team, R/V Falkor, Schmidt Ocean Institute, Palo Alto, United States