The pygmy cormorant is a member of the Phalacrocoracidae (cormorant) family of seabirds. It breeds in south-eastern Europe and south-western Asia. It is partially migratory, with northern populations wintering further south, mostly within its breeding range. It is a rare migrant to western Europe.
The common dace is a species of freshwater and brackish water ray-finned fish from the family Cyprinidae which is native to Europe but which has been introduced to other parts of the world. It is a quarry species for coarse anglers.
The Iskar is a right tributary of the Danube. With a length of 368 km, it is the longest river that runs entirely within Bulgaria. Originating as three forks in Balkan's highest mountain range Rila, the Iskar flows in a northern direction until its confluence with the Danube. As it flows northwards it fuels the largest artificial lake in the country, the Iskar Reservoir, forms the divide between the Vitosha and Plana Mountains in the west and the Sredna Gora mountain range in the east before entering the Sofia Valley, which contains the nation's capital Sofia. From there the Iskar runs through the Balkan Mountains, forming the spectacular 84 km long Iskar Gorge. As it crosses the mountains, its water course turns in a north-eastern direction at Lakatnik. North of the Balkan Mountains, the river crosses the Danubian Plain and finally flows into the Danube between the villages of Baykal and Gigen. Geologically, Iskar is the oldest river in the Balkan Peninsula.
Romanichthys is a genus of ray-finned fish, one of two genera in the tribe Romanichthyini, which along with the tribe Luciopercini, forms the subfamily Luciopercinae of the family Percidae, alongside the perches, ruffes, and darters. The genus contains the single species Romanichthys valsanicola, known as the sculpin-perch, asprete, or Romanian darter.
A rheophile is an animal that prefers to live in fast-moving water.
The Danube bleak or Caspian shemaya is a species of freshwater fish in the family Cyprinidae. It is found in Iran, Ukraine, Georgia, Armenia, Slovakia, Moldova, Greece, Czechia, Azerbaijan, Turkiye, Afghanistan, Austria, Bosnia and Herzegovina, Bulgaria, Croatia, Switzerland, Germany, Hungary, Italy, Romania, Russia, Serbia, Slovenia, Turkmenistan, and Uzbekistan.
The Kessler's gudgeon is a European species of freshwater fish in the family Cyprinidae. It is found in the Danube and Vistula drainage basins, including parts of Poland, Austria, the Czech Republic, Ukraine, Bulgaria, Romania, Moldova, Hungary, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, Slovakia, and Slovenia. It is a small fish of no economic or sporting importance. It was at one time classified as Gobio kessleri.
The Russian sturgeon, also known as the diamond sturgeon or Danube sturgeon, is a species of fish in the family Acipenseridae. It is found in Azerbaijan, Bulgaria, Georgia, Iran, Kazakhstan, Romania, Russia, Turkey, Turkmenistan, and Ukraine. It is also found in the Caspian Sea. This fish can grow up to about 235 cm (93 in) and weigh 115 kg (254 lb). Russian sturgeon mature and reproduce slowly, making them highly vulnerable to fishing. It is distinguished from other Acipenser species by its short snout with a rounded tip as well as its lower lip which is interrupted at its center.
Balon's ruffe, also known as the Danube ruffe, is a species of freshwater ray-finned fish, a ruffe, from the family Percidae which is native to the drainages of the Danube from delta to Germany and the Dnieper from delta to Kyiv and is expected to occur in the Dniester. It inhabits areas with sand or mud substrates. It is active at night and feeds on small invertebrates. This species can reach a length of 15 centimetres (5.9 in) SL. It is named after Polish-Canadian ichthyologist Eugene K. Balon (1930-2013).
Zingel balcanicus, the Vardar streber is a species of freshwater ray-finned fish in the family Percidae, the perches, ruffes, pikeperches and the darters. This species is endemic to the Vardar or Axios River in North Macedonia and its distribution may extend to the lower reaches of the river in Greece. Its biology is little known but other species in the genus Zingel require turbulent flows.
Zingel is a genus of fish in the family Percidae. They are long and slender, reaching 12 to 48 cm in length. They are found in rivers and streams in Europe. They feed mainly on aquatic invertebrates such as crustaceans and insect larvae, and also eat small fish. While they were all classed as endangered or vulnerable in the past, environmental improvements have allowed some to be reclassified to least concern.
The Pontic shad, also referred to as the Black Sea shad or Kerch shad, is a species of clupeid fish in the genus Alosa, native to the Black Sea and Sea of Azov basins.
Zingel asper, also known as the Rhone streber, is a species of freshwater ray-finned fish in the family Percidae that is at a high risk of becoming extinct due to habitat destruction and pollution. It is endemic to the rivers Durance and Beaume in the Rhône basin in France and Switzerland.
Zingel zingel, the zingel, is a species of freshwater ray-finned fish in the family Percidae. It is found in fast-flowing streams in southeastern Europe. It is the type species of the genus Zingel.
The Nera Gorge-Beușnița National Park is a protected area situated in Romania, in Caraș-Severin County.
This list is of the heaviest European freshwater fish caught using the traditional angling method of rod and line.
The Luciopercinae is a subfamily of ray-finned fish, classified within the family Percidae, the subfamily includes the pike-perches and zingels. The pike-perches of the genus Sander have an Holarctic distribution while the zingels of the tribe Romanichthyini are found in Europe. They are largely freshwater species but some can be found in brackish water.
Romanichthyini is a tribe of freshwater ray-finned fish which is one of two tribes in the subfamily Luciopercinae, which in turn is classified under the family Percidae, the family also includes the perches, pikeperches, ruffes and darters.
