''Caspiosoma caspium'' is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of Ponto-Caspian

goby Goby is a common name for many species of small to medium sized ray-finned fish, normally with large heads and tapered bodies, which are found in marine, brackish and freshwater environments. Traditionally most of the species called gobies have b ...

native to the

deltas A river delta is a landform shaped like a triangle, created by deposition of sediment that is carried by a river and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarel ...

of rivers inflows to the north-western

Black Sea The Black Sea is a marginal mediterranean sea of the Atlantic Ocean lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia, Roma ...

Dnieper } The Dnieper () or Dnipro (); , ; . is one of the major transboundary rivers of Europe, rising in the Valdai Hills near Smolensk, Russia, before flowing through Belarus and Ukraine to the Black Sea. It is the longest river of Ukraine and B ...

up to

Berislav Berislav is a Slavic masculine given name derived from ''beri'' - "he/she carries" and ''slava'' - "glory, fame". Feminine form is Berislava. Another spelling is Berisav. The following notable people have this name: * Berislav Rončević - Bos ...

, also in the Dnieper-Bug Estuary and

Berezan Estuary Berezan Estuary, or Berezanskyi Liman ( uk, Березанський лиман, tr, Büzülu liman), is open estuary on the northern coast of the Black Sea, western from the town Ochakiv. Length 26 km, width 4 km in south. Separated fr ...

Danube The Danube ( ; ) is a river that was once a long-standing frontier of the Roman Empire and today connects 10 European countries, running through their territories or being a border. Originating in Germany, the Danube flows southeast for , pa ...

Dniester The Dniester, ; rus, Дне́стр, links=1, Dnéstr, ˈdⁿʲestr; ro, Nistru; grc, Τύρᾱς, Tyrās, ; la, Tyrās, la, Danaster, label=none, ) ( ,) is a transboundary river in Eastern Europe. It runs first through Ukraine and th ...

with the

estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environment ...

Cuciurgan Reservoir The Cuciurgan Reservoir ( ro, Cuciurgan; Ukrainian language, Ukrainian: ''Kuchurhan'') is a large water reservoir, built on Kuchurhan River on the state border between Ukraine and Moldova. The lake is located in the south-eastern part of the Admi ...

. Found in the delta of the

Don River The Don ( rus, Дон, p=don) is the fifth-longest river in Europe. Flowing from Central Russia to the Sea of Azov in Southern Russia, it is one of Russia's largest rivers and played an important role for traders from the Byzantine Empire. Its ...

Volga The Volga (; russian: Во́лга, a=Ru-Волга.ogg, p=ˈvoɫɡə) is the List of rivers of Europe#Rivers of Europe by length, longest river in Europe. Situated in Russia, it flows through Central Russia to Southern Russia and into the Cas ...

, central and northern parts of the

Caspian Sea The Caspian Sea is the world's largest inland body of water, often described as the world's largest lake or a full-fledged sea. An endorheic basin, it lies between Europe and Asia; east of the Caucasus, west of the broad steppe of Central Asia ...

and rivers flowing into the

Sea of Azov The Sea of Azov ( Crimean Tatar: ''Azaq deñizi''; russian: Азовское море, Azovskoye more; uk, Азовське море, Azovs'ke more) is a sea in Eastern Europe connected to the Black Sea by the narrow (about ) Strait of Kerch, ...

. It can be found at depths of from . This species can reach a length of TL. It is currently the only known member of its genus.

References

External links

AQUATAB

World Register of Marine Species
Benthophilinae Freshwater fish of Europe Fish of the Black Sea Fish of the Caspian Sea Fish of Europe Fish described in 1877 {{Gobiidae-stub