Danube

The Danube, also known as the Danube in other languages) is Europe's second-longest river, after the Volga, and the European Union's longest river. It's in the Central and Eastern European region.

The Danube was originally a long-standing Roman Empire border, and today it runs through more countries than any other river in the world, passing through ten of them. The Danube runs southeast from Germany for 2,860 kilometers (1,780 miles), passing through or touching the borders of Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova, and Ukraine before emptying into the Black Sea. Its drainage basin encompasses nine other countries.

Fish species such as pike, zander, huchen, Wels catfish, burbot, and tench can be found in the Danube river basin. It also supports a diverse population of carp, sturgeon, salmon, and trout. The Danube Delta and the lower stretch of the river are home to a few species of euryhaline fish, including European seabass, mullet, and eel.

Length: 1.075 km