Rearing tilapia Russia is a country with vast water resources, with a rich variety of aquaculture. However, in recent years, the harvesting of target species has sharply reduced, due to environmental problems, uncontrolled fishing and depletion of herds. Moreover, the sanctions imposed against Russia raised the problem of providing Russians with fish products very acutely, because fish is a useful and necessary product of our daily ration. The urgency of reviving and restoring fisheries is beyond any doubts, therefore, industrial methods of breeding aquaculture objects are becoming increasingly important. Especially important to pay attention to the cultivation of fish in the pools with the use of warm wastewater energy facilities, circulating systems and installations with a closed water supply cycle (ICWS). Rearing fish products of valuable species and breeds (salmon, eels, sturgeon, tilapia, etc.), or fish seeding, in ICWS, is now economically profitable and expedient. Various types of tilapias can rightly be considered one of the most promising objects of cultivation in ICWS, since tilapia has a high growth rate, is undemanding to the hydrochemical regime and the quality of feed, has a high resistance to stress and good tastiness. Tilapia is a fish of tropical origin, therefore for its cultivation it is necessary to create warm-water farms, such as closed water installations, geothermal waters, cooling pools of nuclear power plants, hydroelectric power plants. In order to obtain environmentally friendly products, it is necessary to monitor the diet of tilapia carefully and to avoid various chemicals in the water. Tilapia is a fish with early puberty (3–7 months) and continuous breeding, and in optimal growing conditions, spawning occurs regularly with an interval of 45–60 days. The possibility of year-round production of offspring when cultivated under conditions of recirculation systems made tilapia indispensable in studying the effect of various extreme effects on growth, development and survival. When rearing tilapia, it is necessary to use a well-digestible feed with biologically active additives that improve the absorption of feed and have a beneficial effect on the physiological state of the fish. However, in the conditions of a constant increase in prices for imported feed, it is necessary to consider the creation of efficient domestic feeds in order to eliminate dependence on foreign producers in the future.