What are the two interface regions where salt and freshwater zones meet?

Question

(one is estuaries, whats the other)

Answer 1

'Lagoons' . that is brackish water that is only occasionally inundated by the sea-water and is also fed by rainwater. 

Answer 2

A wetland  is the other region.

Answer 3

Rivers and lakes.  

Answer 4

groundwater? Icebergs?

Answer 5

Ice melt like when an ice sheet or glacier melt in salt water . The ice is fresh water . 

Answer 6

The distinction between "lagoon" and "estuary" varies between authorities. Richard A. Davis Jr. restricts "lagoon" to bodies of water with little or no fresh water inflow, and little or no tidal flow, and calls any bay that receives a regular flow of fresh water an "estuary". Davis does state that the terms "lagoon" and "estuary" are "often loosely applied, even in scientific literature." Timothy M. Kusky characterizes lagoons as normally being elongated parallel to the coast, while estuaries are usually drowned river valleys, elongated perpendicular to the coast.

Source(s): https://en.wikipedia.org/wiki/Lagoon

Answer 7

Tide pools                                     .