The term 'branched river mouth' is often used to describe a DELTA, which is a landform created when a river splits into multiple smaller rivers before entering a larger body of water. A DELTA is typically characterized by its fan-like shape, with the branches of the river forming the edges of the fan. The term 'DELTA' comes from the Greek letter Δ, which is shaped like a triangle, and is used to represent the shape of a DELTA.