Selection of the right type of feed for fish is very important, so that the optimal fish growth and the need to purchase feed costs can be reduced. So that the benefits to be larger. This system is expected to help the fish farmers in choosing the right type of fish feed. The method used in the development of this system is Tahani method Fuzzy Database System. This method is used because it can process the data are ambiguous. The data includes the data processed fish species and age of the fish, the data type of feed, and feed price data. The data is then processed using fuzzy database Tahani method to produce output in the form on the right type of feed.