Madeleine J.H. van OppenAustralian Institute of Marine Science, PMB 3, Townsville MC, Queensland 4810, Australia and School of BioSciences, University of Melbourne, Parkville, Victoria 3010, Australiae-mail: madeleine.van@unimelb.edu.auJ.M. LoughAustralian Institute of Marine Science, PMB 3, Townsville MC, Queensland 4810, Australia and ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australiae-mail: j.lough@aims.gov.au