Soon traditional fishing will no longer be the largest fish supplier in the world. Aquaculture has been growing constantly year after year and it will soon become a major source of fish in the world. It offers many advantages over traditional fishing and it is scientifically proven that farmed fish is healthier than wild fish. On a relatively small unit of the sea surface it brings a large and sustained yield of protein with minimal environmental impact. Fish is an important part of a balanced human diet and that is why we need this automated nutrition system in mariculture. Fish is grown in the cages where all parameters essential for optimal growth of fish are followed. User interface where we can follow those parameters is built by using programming languages. The possibility of control over that parameters is also given (sea temperature, salinity, transparency, oxygen level, speed of sea currents, state of food containers) and warning to the users of the system if parameters pass over certain values. User gets the warning in order to make possible continuous monitoring of the system and to avoid all potentially unwanted negative biological processes. All data are stored on the server and available via mobile application. Master thesis gives solution for complete automatization of system for feeding fish and it has system for monitoring, management and control of fish farm. This mobile application went through the process of making from the very idea, along with setting requirements through the development and production of physical prototype, but it has open possibility of upgrade and further development