Seasonal and interannual variability of fluxes of several primary and secondary producers in the Mauritanian coastal upwelling over a continuous trap experiment extending almost five years are presented (1,900 days, June 2003 through March 2008). Fluxes of diatoms, coccolithophorids, calcareous and organic-walled dinoflagellate cysts, planktonic foraminifera and pteropods and the species-specific composition of the assemblages collected at the mooring site CBeu (Cape Blanc eutrophic) are discussed.