''Benthophilus casachicus'' is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

goby The Gobioidei are a suborder of percomorph fish. Many of these fishes are called gobies. It is by far the largest and most diverse order within the order Gobiiformes, and one of the most diverse groups of ray-finned fish in general. The subord ...

widespread along the eastern coasts of the

Caspian Sea The Caspian Sea is the world's largest inland body of water, described as the List of lakes by area, world's largest lake and usually referred to as a full-fledged sea. An endorheic basin, it lies between Europe and Asia: east of the Caucasus, ...

from the Cape Pischanyi to

Ogurja Ada Ogurja Ada (sometimes also spelt "Ogurga") is the largest island in both Turkmenistan and the Caspian Sea by area. Ogurja Island is also widely known by its Russian name Ogurchinskiy Island ''(Ostrov Ogurchinskiy)''. Geography Ogurja is a desert ...

at south, also near

Astrakhan Astrakhan (, ) is the largest city and administrative centre of Astrakhan Oblast in southern Russia. The city lies on two banks of the Volga, in the upper part of the Volga Delta, on eleven islands of the Caspian Depression, from the Caspian Se ...

. 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 environm ...

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 Taxa named by Dadash Bahman oglu Ragimov Fish described in 1978 {{Gobiidae-stub