''Benthophilus casachicus'' 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 goby widespread along the eastern coasts 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 ...

from the Cape Pischanyi to Ogurja Ada at south, also near Astrakhan. This species prefers

estuaries 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 ...

and coastal waters. This species can reach a length of TL.

References

Benthophilus Fish of Central Asia Fish of Russia Fish of the Caspian Sea Endemic fauna of the Caspian Sea Fish described in 1978 {{Gobiidae-stub