“…For effective orientation, animals require cues that are heterogeneous in the environment and contain reliable information about potential settlement sites [26,27]. These potential cues include vision [28], olfaction [23,[29][30][31], sounds emanating from reefs [10][11][12], differences in wind-or wave-induced turbulence [23], gradients in abundance of fish, plankton or reef detritus [23] or a combination of several of them [27,32,33]. Many of these cues, such as vision, are effective only at small distances from the reef [34][35][36] (a few tens of meters) [23], whereas sounds from the reef (e.g., from benthic invertebrates and fish) are potential cues for larval orientation over long distances.…”