In the period from February to August 2019, I was doing an internship at the danish company AquaPri with the support of programme Erasmus+. This company is actually one of the biggest producers of pikeperch (Sander lucioperca) in recirculated aquaculture systems (RAS). It is situated at modern farm in Gamst, close to the town Vejen. During my internship I gained lots of valuable experience and information, which are unnecessary for the right function and management of RAS. In the second period of my internship, the production manager allocated me a partial responsibility for the overall running of the farm. We also discussed another cooperation like the possibility for other students, who will be able to do an internship at the farm in the future.