Area of expertise: ichthyopathology, development of modern methods for diagnosing fish diseases under conditions of climate change and its impact on aquaculture and fish ecology. Study of potential risks of nanomaterials and nanotechnologies, development of criteria for their safety for human health and the impact of nanoaccumulators on hydrobionts. The use of environmentally friendly preparations in aquaculture to obtain high-quality fish products. Influence of environmental factors on fish health. The study of fish diseases of various etiologies. Detection of genetic disorders in tumoral cells (lymphosarcoma of pike and a pikeperch).