In the culture and breeding of aquatics, establish the conditions as close as possible to those of the natural habitat, it is more likely to succeed. One of the most important challenges in this regard has always been the type of food and the feeding method of aquatics. Attempts have been made to make artificial foods for all types of aquatic animals, but due to the diversity of farmed fish, especially marine fishes, providing a balanced diet for all types of aquatic animals has faced difficulties. Therefore, using live foods in aquaculture has always had a special importance. The most important characteristics of a suitable live food are high nutritional value, free from contamination and pathogens, and easy, economical and sustainable production. White worm is one of the best options in farming a variety of aquatic animals, considering the above characteristics and compared to other live foods. This worm has been used for feeding of different marine and freshwater fishes, and different species have showed different responses, that indicate using this worm has high potential, and in the other hand, there are need supplemental investigation on feeding of different fish species. Therefore, it seems accessing basic data about this worm is very necessary. This paper presents the biology, nutritional value and enrichment, reproduction, and harvesting methods of this worm.