Researchers at the Balaton Limnology Institute of the Eötvös Loránd University Ecological Research Center have found a way to reduce the high production costs of artificial rearing and market utilization of domestic freshwater, noble predatory fish by using mussel flour as a substitute for expensive sea fishmeal. This breakthrough, funded by the Hungarian Fisheries Management Operational Program, involves developing a technology to separate shellfish meat and shell, which has shown to be effective in feeding and enhancing the growth and meat quality of catfish fry. The mussel bed algae system has also proven to be a suitable biological filter for the purification of fish farm effluent. The researchers are now looking for additional sources for the implementation of their applied research plan, with the goal of creating an economical feed ingredient for fish farming.