The number of sprats and sturgeons that feed on sprats decreased in the Caspian Sea by about 10 times. Aside from that, the number of seals in the Caspian Sea has also decreased.
The number of zooplankton as well as sprats decreased in the Caspian Sea by about 10 times compared to 1999-2000. This process has been going on for almost 10 years. Reduction of the sprat population resulted in a nearly 10 times decrease of the number of sturgeons and seals, which feed on sprat.
The population of Beluga, decreased even more as a result of the impact of Mnemiopsis
The presence of Mnemiopsis in the Azerbaijani sector of the Caspian Sea has had a maximum negative impact on the fish population in the waters adjacent to the territory of the district of Lankaran.