MAIN MORPHO-BIOLOGICAL CHARACTERISTICS OF THE EUROPEAN FLOUNDER (PLATICHTHYS FLESUS LINNAEUS, 1785) OF THE SHABOLATSKI ESTUARY IN THE PERIOD FROM 1980 TO 2020. - Shekk, P.; Shumarin, D. (Fisheries Science of Ukraine / Scientific Journal Rybohospodars'ka Nauka Ukrayiny, 2025)