The European bullhead is a freshwater fish that is widely distributed in Europe, mainly in rivers. It is a member of the family Cottidae, a type of sculpin. It is also known as the miller's thumb, freshwater sculpin, common bullhead, and cob.
Alburnus is a genus of fish in the family Cyprinidae, the carps and minnows. They are known commonly as bleaks. A group of species in the genus is known as shemayas. The genus occurs in the western Palearctic realm, and the center of diversity is in Turkey.
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 pigo is a species of freshwater fish in the roach genus Rutilus of the family Cyprinidae. The fish is native to northern Italy and Switzerland. It inhabits subalpine lakes of the northern Adriatic basin from the Livenza to the Po drainage, including Lakes Maggiore, Lugano, and Como.
The humpback whitefish, also referred to as the bottom whitefish, the Arctic whitefish or the pidschian, is a species of freshwater whitefish with a northern distribution. It is one of the members in the broader common whitefish complex, or the Coregonus clupeaformis complex. This fish lives in estuaries and brackish water near river mouths, in deltas and in slowly running rivers, in large lakes with tributaries, and floodplain lakes. It can migrate long distances upriver for spawning.
Alburnus arborella is a species of ray-finned fish in the carp family Cyprinidae. It is a freshwater fish occurring in lakes and streams in Europe. It is distributed in Croatia, Italy, Slovenia, and Switzerland.
The North Caucasian bleak is a species of ray-finned fish in the genus Alburnus. It is found in the western and southwestern Caspian basin in the countries of Armenia, Azerbaijan, Georgia, Iran and the Russian Federation.
Alburnus leobergi is a species of ray-finned fish in the genus Alburnus; it is widespread in Eastern Europe in the Sea of Azov basin. A landlocked population exists in Tsimlyansk Reservoir. It is a benthopelagic fish, up to 40.3 cm long.
Alburnus macedonicus is a species of cyprinid fish in the subfamily Leuciscinae. It is endemic to Doiran Lake in Greece and North Macedonia. It is threatened by falling water level in the lake.
Alburnus mandrensis is a species of ray-finned fish in the genus Alburnus. The species is restricted only to the drainage of Lake Mandra in Bulgaria that includes the rivers Izvorska reka, Fakiyska reka, Sredetska reka and Rusokastrenska reka. It is threatened by pollution and the impoundment of spawning streams.
Alburnus mento is a species of freshwater fish, a bleak in the family Leuciscidae. Its distribution is in subalpine lakes in Germany and Austria.
Alburnus mentoides is a species of ray-finned fish in the genus Alburnus that is endemic to Crimea in Ukraine. This freshwater fish grows up to a length of 13 centimetres (5.1 in) (SL).
The Black Sea bleak is a species of ray-finned fish in the genus Alburnus, that can be found in Bulgaria in river Veleka, and Turkey in river Rezovska. The species are threatened due to the drought in their rivers.
Alburnus vistonicus is a species of ray-finned fish in the genus Alburnus that is endemic to the Lake Vistonida drainage in Greece. This species reaches a maximum length of 21.7 centimetres (8.5 in) (SL).
Coregonus maraena, referred to in English as the maraene, maraena whitefish, vendace, cisco, lake herring, lake whitefish or the whitefish, is a whitefish of the family Salmonidae that occurs in the Baltic Sea basin - in the sea itself and the inflowing rivers, and in several lakes as landlocked populations. It is found in Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Netherlands, Norway, Poland, Slovakia, Russia and Sweden. As of 2013, it has been listed as a vulnerable species by the IUCN and as endangered by HELCOM. It is an extremely important fish within the Baltic Sea ecosystem, both for population equilibrium and for the local diets of the surrounding human population. Due to a variety of factors, mostly overfishing, the maraena's population dwindled to near-extinction levels. Thus, rampant repopulation was enacted to preserve this important fish.
The Ukrainian gudgeon is a species of gudgeon, a small freshwater fish in the family Cyprinidae. It is widespread in the lower parts of Dniester and Southern Bug drainages in Ukraine and Moldova. It is also likely to be present in the lower Dnieper River. It is a freshwater demersal fish, and grows up to 13 cm length.
The Danube whitefin gudgeon is a species of freshwater fish in the family Cyprinidae. It is distributed in the drainage of the Danube river in Europe. The species has been known to reach a length of 11.5 cm (4.5 in); the oldest reported age for the species is 4 years. Its diet includes insect larvae.
Cottus metae is a species of freshwater ray-finned fish belonging to the family Cottidae, the typical sculpins. It inhabits the upper Save River system in the Danube basin. It reaches a maximum length of 9.7 cm. It prefers small streams to medium-sized rivers. This species was described as a separate species from the European bullhead in 2005 by Jörg Freyhof, Maurice Kottelat and Arne W. Nolte. The specific name 'honours the Slovenian biologist Meta Povž, in recognition of her assistance to the authors in a variety of projects.
Cottus transsilvaniae is a species of freshwater ray-finned fish belonging to the family Cottidae, the typical sculpins. It is endemic to Romania in the upper Arges River in the Danube drainage. It reaches a maximum length of 9.7 cm. It prefers rocky shoals and riffles of small upland streams. his species was described as a separate species from the European bullhead in 2005 by Jörg Freyhof, Maurice Kottelat and Arne W. Nolte. The specific name transsilvaniae means “of Transsilvania”, the Latin name of the Transylvania.
Alburnus thessalicus is a species of ray-finned fish in the carp family Cyprinidae. It is a freshwater fish occurring in lakes and streams in Europe. It is found in Albania, Bulgaria, Greece, North Macedonia, and Serbia.
