Birgit A Klein, BSH Federal Maritime and Hydrographic Agency, Hamburg, Germany, Nicolas Kolodziejczyk, UBO, CNRS, IRD, Ifremer, Laboratoire d’Oceanographie Physique et Spatiale (LOPS), Plouzane, France, Plouzane, France and Esmee Van Wijk, CSIRO Australian Resources Research Center, Perth, Australia