The riverine goby (''Ponticola rhodioni'') 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
gobiid fish native to rivers in the north-eastern part of the
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 ...
basin at the border of Europe and Asia. It is one of the numerous species of
benthophiline gobies endemic to the Ponto-Caspian region. It is known to occur in the basins of
river
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...
s north of the
and also in the
Kuban River basin. This fish can be found in both fresh and
brackish
Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...
waters. It can reach a length of
TL.
References
Ponticola
Fish of Russia
Fish described in 1994
{{Gobiidae-stub