Complex ecological monitoring is carried out every year in order to determine the current state of fish and other aquatic biological resources in the Caspian Sea, future dynamics, and fishing quota forecasts for the next year.

APA reports that Mehman Akhundov, director of the Biological Resources Research Center of the Biological Diversity Protection Service, said that according to the results of recent monitoring conducted by the scientific research vessel "Alif Hajiyev" in order to study the biological resources and marine environment of the Caspian Sea, the condition of herrings and mullets in the sea is satisfactory. It was observed that the fish of common weight, kutum, Caspian bream, eastern bream and shamayi fish decreased:

"In order to contribute to the increase of fish resources in our country, every year, the release of fish babies grown in fish breeding facilities of ETSN is carried out in natural water bodies."