The eastern tubenose goby (''Proterorhinus nasalis'') is a
species of
gobiid fish native to fresh and
brackish waters of the basins of 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, ...
and the
Caspian Sea and has
invaded
An invasion is a military offensive in which large numbers of combatants of one geopolitical entity aggressively enter territory owned by another such entity, generally with the objective of either: conquering; liberating or re-establishing con ...
the upper reaches of the
Volga River from its native occurrence in the delta. This species prefers slow flowing rivers or still waters with plentiful rocks or vegetation. It can reach a length of
SL.
It is probably the same species as that recently treated as ''
Proterorhinus semipellucidus
''Proterorhinus semipellucidus '' is a species of gobiid fish, a tubenose goby originally described from the Gharasu River near Gorgan Bay of the Caspian Sea in Iran. Following the systematic decomposition of the tubenose gobies it was sugge ...
'' (or ''P.'' cf. ''semipellucidus'').
[Brian W. Coad]
Freshwater Fishes of Iran
(accessed 22 Feb 2015)
References
Eastern tubenose goby
Fish of the Caspian Sea
Fish of Western Asia
Fish described in 1963
Endemic fauna of the Caspian Sea
Eastern tubenose goby
{{Gobiidae-stub