1. Australian Research Council Centre of Excellence for Coral Reef Studies, and School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia
2. Programme for Physiology and Neurobiology, Department of Biosciences, University of Oslo, Oslo 0316, Norway
3. Consiglio Nazionale delle Ricerche – Istituto per l'Ambiente Marino Costiero, Torregrande, Oristano 09072, Italy