Johnna Holding, Aarhus University, Aarhus C, Denmark, Kristina Brown, Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, BC, Canada, Uma Suren Bhatt, University of Alaska Fairbanks, Fairbanks, AK, United States, Henry Huntington, Self Employed, Washington, United States and Carlos M Duarte, King Abdullah University of Science and Technology, Red Sea Research Center, Thuwal, Saudi Arabia