1 Antarctic Ecosystem Research Division, NOAA-NMFS-SWFSC, 8901 La Jolla Shores Drive, La Jolla, 92037, CA, USA
2 Scripps Institution of Oceanography, University of California San Diego, Mail Code 0208, 9500, Gilman Drive, La Jolla 92037, CA, USA
3 National Geographic Society, Remote Imaging Group, 1145 17th Street NW, Washington 20036, DC, USA