Recirculating aquaculture systems (RAS) are innovative fish farming setups that recycle water to create a sustainable environment for aquatic life. These systems filter and purify water, allowing it to be reused multiple times, which reduces water consumption and minimizes waste. RAS can be used to raise various species, including salmon, tilapia, and trout. In RAS, fish are kept in tanks where water quality is closely monitored and controlled. This method allows for year-round production, independent of external environmental conditions. Additionally, RAS can be integrated with hydroponics to grow plants alongside fish, promoting a more efficient use of resources.