As the world's population grows, new technologies for aquaculture production are needed to put less pressure on natural resources and reduce the cost of fish. Due to the insufficiency of seafood, the increase in population causes the price of fish to rise and excessive pressure on wild aquatic resources. Biofloc Technology (BFT) production system is a technique that creates employment and income for the producer and is beneficial for the consumer by providing aquatic products at a lower price. Biofloc technology, on the other hand, reduces the pressure on wild aquatic resources and helps conserve them. This system prevents environmental pollution by not discharging effluent rich in organic matter into the environment. Interest in biofloc - based systems in aquaculture has increased dramatically over the past 20 years because these systems have good biosecurity and sustainable economic production and are environmentally friendly. In aquaculture, tilapia and shrimp are known as species with the ability to use natural products and live feed, and their production industry is developing very rapidly in the world. Iran has always faced water shortages and the need for optimal use of available water resources has always been emphasized by the government and in accordance with the general policies of the system and has always been emphasized by the Ministry of Agriculture Jihad. Therefore, the use of products that require less water to produce and also change attitudes toward traditional production systems is inevitable. In this regard, tilapia has been introduced to the warmwater fish farming industry of the country as an option that requires little water for production and is suitable for aquaculture. Biofloc technology, which is referred to as a system without water change or limited water change, can play an important role in reducing water consumption and environmental pollution because the biofloc production system has been developed to reduce the problems caused by intensive aquaculture. In areas with water or land shortages, intensive aquaculture is more important. In the aquaculture economics, the two issues of feed supply (most expensive) and water and land (most limited resources) play very important roles. Intensive aquaculture is associated with the production of large volumes of waste. To solve this problem, infrastructure works need to be performed. Biofloc technology is a new aquaculture technique that is often used as a way to reduce feed costs and reduce environmental hazards by reducing the waste disposal from the farming system. This technology is based on the stimulation of heterotrophic bacteria to mineralize inorganic nitrogen. These bacteria use carbohydrates, ammonium, and nitrogenous wastes to build new cells, while at the same time flocculating organic matter, microbial organisms, and suspended solids. This process causes uneaten feeds and feces to be used. In addition, this process reduces water exchange and thus reduces the risk of infectious diseases from the water entering the farm. It also prevents pathogens from entering the farm due to the lack of need for running water and continuous water inflow. In the traditional tilapia farming system, 5 to 10 % of the water volume is changed daily to control water quality. Water change causes the spread of pathogens and its prevalence in the region. In this case, not changing the water is a way to increase biosecurity. In the biofloc production system, solids are allowed to accumulate in water. As long as water is aerated and mixed well, the flocculated materials are suspended in the water and the water quality is under control. Of course, the management of flocculated materials is not so simple, and in order for the system to function fully and efficiently and to produce proper production, it has its own technical complexities. There are still ambiguities in the field of farm design, type and shape of structure, amount and type of aeration, cheap carbon resources, and additional economic evaluation should be conducted in aquaculture conditions in Iran and the relevant technical knowledge package should be provided to applicants. In the field of biofloc formation, system maintenance and tilapia farming on a commercial scale, valuable experiences have been gained in recent years at the National Research Centre of Saline - water Aquatics Bafgh, Yazd. In this regard, the production of 9 tons of tilapia in a 1000 cubic meter pool in a greenhouse with liner covers and the production of 25 kg / m3 in a concrete pool with a limited water exchange rate of 5 % per day can be mention.