Jobos Bay National Estuarine Research Reserve (JBNERR, sometimes JOBNERR or JOBANERR) is a federally protected estuary in Aguirre, Puerto Rico. The bay is an intertidal tropical ecosystem dominated by seagrass beds, coral reefs, and mangroves. In an area of 1140 hectares, the reserve contains five distinct habitat types and provides sanctuary to several endangered species. JBNERR is one of 28 reserves that comprise the National Oceanic and Atmospheric Administration’s (NOAA) National Estuarine Research Reserve System.