Allison Cusick, Scripps Institution of Oceanography, La Jolla, CA, United States, Martina Mascioni, Universidad Nacional de La Plata, Argentina, Gastón O. Almandoz, Universidad Nacional de La Plata, La Plata, Argentina and Maria Vernet, Scripps Institution of Oceanography, Integrative Oceanography Division, La Jolla, CA, United States