Box-plot of the estimated time to return to normal behavior (TRB) for the three species. Twenty-nine individuals with a residency index (IR) >0.2 were considered. Fish number in brackets. European eel (E), thinlip grey mullet (M) and common bream (B). Species sharing at least a common superscript are not significantly different at p < 0.05 (Wilcoxon rank sum test).