The Bunica river is a short river in Bosnia and Herzegovina and a left bank tributary of the Buna. Its source (Vrelo Bunice), located under sharp cliffs between two villages Hodbina and Malo Polje, 14 km south from Mostar. It is very deep and strong karstic spring, very hard to access. Together with the Buna river, flows west for approximately 10 km and joins the Neretva river near Buna village. The Bunica river is main tributari of the Buna.