Estuary 
 An estuary[1] is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. 
https://en.wikipedia.org/wiki/Estuary Sandy Shores Animals 
Just as there are many different types of shorelines, there are many different types of animals that make the shoreline home. 
mbgnet.net/salt/sandy/animals/index.htm... Estuaries -- Where Rivers Meet the Sea 
An estuary is a partially enclosed body of water where incoming seawater is mixed with fresh water coming from the land 
mbgnet.net/salt/sandy/estuaries.htm Estuaries Maps 
An estuary is an unique environment where fresh water and salt water come together. Estuaries are found on the coast where a river or bay or other source of fresh water has access to the open sea 
windows.ucar.edu/tour/link=/earth/Water... Shorelines 
Shorelines are where oceans and seas meet land. The change is abrupt and sudden 
mbgnet.net/salt/sandy/indexfr.htm Salt Marshes 
Just like marshes further inland, salt marshes are also wetlands 
mbgnet.net/salt/sandy/saltmarsh.htm Surfrider Home Page 
 surfrider.org/ Sandy Shorelines 
A sandy beach is made up of minute grains of sand or crushed shells and rock 
mbgnet.net/salt/sandy/sandy.htm