Estuaries are semi or partially enclosed bodies of water where seawater and freshwater mix.
They may be locally called bays, sounds or river mouths. Along the Georgia coast, our estuarine habitats include the coastal rivers, salt marshes and tidal marsh creeks. Seawater from the ocean and freshwater, draining from land, mix together in estuaries. It is to be expected to find a range of salt concentrations throughout an estuary. The salinity of the water affects the organisms living in it, and some species are more tolerant to a wider range of salinity than are others.