Pair-formation in coral reef fishes : an ecological perspective / Simon J. Brandl and David R. Bellwood -- The ecosystem roles of Parrotfishes on tropical reefs / Roberta M. Bonaldo, Andrew S. Hoey and David R. Bellwood -- Limits to understanding and managing outbreaks of Crown-of-Thorns Starfish (Acanthaster spp.) / Morgan S. Pratchett, Ciemon F. Caballes, Jairo A. Rivera-Posada and Hugh P.A. Sweatman -- The ecology of Ghost Crabs / Serena Lucrezi and Thomas A. Schlacher -- Citizen scientists and marine research : volunteer participants, their contributions, and projection for the future / Martin Thiel, Miguel Angel Penna-Diaz, Guillermo Luna-Jorquera, Sonia Salas, Javier Sellanes and Wolfgang Stotz -- The claw hypothesis : a new perspective on the role of biogenic sulphur in the regulation of global climate / Tamara K. Green and Angela D. Hatton.