“…The advancement of digital cameras has allowed photo-identification to be a promising alternative because of its efficiency in the field. However, most of the subjects so far researched on are vertebrates, such as sharks (Arzoumanian et al, 2005;Van Tienhoven et al, 2007), sea turtles (Reisser et al, 2008;Schofield et al, 2008), birds (Burghardt et al, 2004), cetaceans (Auger-Méthé andWhitehead, 2007;Auger-Méthé et al, 2010;Beekmans et al, 2005;Mazzoil et al, 2004) and seals (Hiby et al, 2007;Mackey et al, 2007). The painted crayfish Panulirus versicolor (Frisch and Hobbs, 2007) and the octopus Wunderpus photogenicus (Huffard et al, 2008) are probably the only invertebrates that have been tracked using a photo-identification method.…”