ABSTRACT Natural feed is an initial feed that has a complate nutritional content and is closer to the biological needs of fish larvae, one of which is Tubifex sp. Tubifex sp is a type of natural feed that is very important in freshwater aquaculture activities, especially for catfish hatcheries. Tubifex sp. has afairly high nutritional content, 57% protein, 13.3% fat, 2.04% crude fiber, 3.6% as…