Features of changes in the internal organs of the golden grey mullet Chelon auratus (Risso, 1810)

The purpose of the study is to analyze changes in internal organs golden mullet specious caught May 2022 scientific expeditions western part Caspian Sea. Mature mullets were examined. species weighed and measured. There made 152 histological sections 10 (liver, spleen, gills, ovaries, muscles). studied 3-4 years old. collected samples processed by classical techniques. According results conducted research, there have been found numerous that indicate adaptive capabilities fish: microcirculatory disorders (extensions different sizes durations time), abnormalities gills structure (proliferation multilayer non-keratinizing epithelium filaments lamellae usually met Volga river today), fatty hepatic degeneration some degree, hemosiderosis spleen. Changes estimated as 2.8 points, spleen – 3.1 points. Hemosiderosis was also detected liver parenchyma; 2.5 Some skeletal muscle fibers segmented; their change Cardiomyocytes had thickness; 2.3 In general, tissue cell gill apparatus, liver, muscles ovary indicated morphological rearrangement caused response fish organisms environmental conditions.