Duckbill pugolovka
The duckbill pugolovka is a species of gobiid fish endemic to the southern part of the Caspian Sea. It is characterized by its special flattened and elongated head that resembles a duck's bill. It is the only known species in its genus.
It was initially found in 1904 at a depth of . Only recently more samples of this species have been collected from Iranian waters, where it mainly lives at depth. The fish are on average long and at maximum.