This book describes different methods for the development of domain specific automation systems for fish farms. To enhance the software development process a software product line was adopted. Fish farm automation systems can be produced more efficiently by using a code generating approach. Systems are modeled with a high level domain specific language, that allows to produce high-quality automation systems in less time. The installation of fish farm automation systems is significantly simplified. Generated documentation, including an electrical installation plan, provides a good basis for the hardware installation of the system. The generated software includes an extensive test mode which allows for easier detection of errors occurring during the installation and operation. With the proposed software product line costs in the fish farm automation caused by system installation and maintenance work can be saved.