Estuary: An estuary is a partially

An estuary 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. [1] Estuaries act as a refuge for many animal and plant species that depend on this semi-closed aquatic ecosystem to live, as well as to feed and reproduce. Learn more with our article on the different types of ecosystems. ESTUARY definition: 1. the wide part of a river at the place where it joins the sea: 2. the wide part of a river at…. Learn more. An estuary is a partially enclosed body of water along the coast where freshwater from rivers and streams meets and mixes with salt water from the ocean.