We present the first quantified evidence of shifting environmental baselines from an island coral reef fishery (Rodrigues). As
depletion of commercial fish species spreads out from the coast youngsters share few of their elders’ memories of former abundance.
Of three generations, the oldest reported more fish species as depleted (p 0.001), including predators indicative of ecosystem
health and of interest to tourists. They recalled larger catches of the most-cited species Epinephelus multinotatus and
bigger fish (p < 0.001). Generations also differed in their perceptions of island-level environmental change. Shifting baseline studies
may be useful when planning Marine Protected Areas (MPAs) in data-poor countries prioritising sustainable development.