BunaBuna – the river in Bosnia and Herzegovina, left tributary of Neretva, which flows about 15 kilometers downstream of Mostar, in the town of Buna. It is nine kilometers long and has two tributaries: Posrt, which is a non-constant tributary, meaning it exists only in winter, and Bunica, which is a constant tributary, and it flows into Buna north of the town Buna. The highest water levels are in November, and the lowest in July and August. Immediately below the spring in Blagaj there is a meadow and a trout farm. It is rich in Adriatic trout, and in the lower course of the rive rit is rich in eel. There is also Bunski kanal in the stream, a true jewel of nature.