A comparative approach with other estualar and lagoon environments in West Africa has found that despite the hyperhalinity, the specific biomass and richness of fish stands in the Siné-Saloum estuary are relatively high. In addition, it has been found that all ecological functions of the estuary are still adequately insured, with the exception of the enrichment of the adjacent coastal environment, due to the absence of flooding and a sharp decrease in freshwater inflows.