Environment of Azerbaijan
The Caspian Sea is the largest lake on Earth by both area and volume, with a surface area of 371,000 square kilometres (143,244 mi²) and a volume of 78,200 cubic kilometres (18,761 mi³). It is a landlocked endorheic body of water and lies between Asia and Europe. It has a maximum depth of about . It is called a sea because when the Romans discovered it they tasted the water and found it to be salty. It has a salinity of approximately 1.2 percent, about a third the salinity of sea water.
Caspian tyulka
Caspian tyulka, "Clupeonella caspia", is a species of fish in the Clupeidae family. It is found in the Caspian Sea, also in the lower reaches of the rivers Volga, Ural, and possibly Terek. This is a brackishwater pelagic-neritic fish, up to 12 cm maximum length.