From December 3th to December 4th, 2020, members of the Laboratory of Intensive Aquaculture (FFPW USB) MSc. Malinovskyi Oleksandr, PhD. and Bc. Petr Dobrovolný, DiS. visited fish reproduction facilities of the Slovak Fishermen's Association, the municipal organization Martin (Slovakia). The main purpose of the visit was sampling and following transport of internal organs from pikeperch (Sander lucioperca) and grayling (Thymallus thymallus) broodstock. The Slovak Fishermen's Association is going to expand their collaboration and is interested in partnership with the Faculty of Fisheries and Protection of Waters USB.