Guy Stevens is chief executive and founder of the Manta Trust. Daniel Fernando is associate director of the Manta Trust and cofounder of the Blue Resources Trust. Marc Dando is a scientific illustrator and publisher. His books include Sharks of the World and Pocket Guide to Sharks of the World (both Princeton). Giuseppe Notarbartolo di Sciara is an Italian marine conservation ecologist who has worked for forty years to advance knowledge of marine mammals and cartilaginous fishes.