World population is growing rapidly, the food production industry needs to be developed. As the aquaculture industry intensively develops, its environmental impact increases and its strong dependency on fishmeal in the diet, the use of biofloc technology can reduce these problems. The basic principle of the biofloc technology is the retention of waste and its conversion to biofloc as a natural food within the culture system. Now a days biofloc technology has become very popular in aquaculture sector. The concept of floc formation in activated sludge systems can be used for application in biofloc technology. There are so many factors which influence the formation of biofloc. Microbes are manipulated in BFT systems in order to control and reduce toxic inorganic nitrogen concentrations. Extensive development of microbial biomass is an integral part of this process. Microbial proteins in BFT systems should be considered only as a supplement of feed proteins. Many researchers revealed that net protein uptake by the shrimp from biofloc was equivalent to 25 to 50 per cent of conventional protein feeding. Biofloc contains about 30 per cent crude protein along with other essential minerals. Essential fatty acid also found in biofloc which is suitable for dietary requirement of Indian Major Carp (IMC). Therefore, it appears the biofloc can be successfully used as fish feed particularly for herbivorous and omnivorous species. Microorganisms in biofloc might partially replace protein content in diets or decrease its dependence of fishmeal. Biofloc technology provides a more sustainable approach with minimal water exchange along with reduce feed intake and transform it in to a low-cost sustainable technology for sustainable aquaculture development.

Keyword: Biofloc technology; Indian Major Carp (IMC); Microbial protein; Fish feed.