From September 12th to September 22nd, 2021, I did an internship at University College Cork and visited a multitrophic OASIS farm in Ireland. The main goal was to finalize analyses and publications describing the design and operation of the multitrophic farm. The second part of the short-term internships was focused on the use of various sea macroalgae in fish feed. The Bantry Marine Research Station was visited for this purpose. These activities should lead to future studies on the use of novel raw materials in aquafeed. The collaboration gets more realistic outlines in the form of a joint feeding trial within the frame of AquaTech4Feed project, which is scheduled for next year.