The research objective was to compare the use value and quality of fillets of three Cyprinidae fish species: common carp (Cyprinus carpio L.), grass carp (Ctenopharyngodon iddela Val.), and bighead carp (Aristichtys nobilis Rich.) reared in a polyculture. Fish were captured from farm ponds to raise fish in the Province of Lublin. The following was analyzed: morphometric dimensions, weight and percent content of body parts, physical-chemical characteristics of the fillets (pH, electrical conductivity, colour), chemical features of the fillets (water, mineral compounds as ash, protein, fat, selected macro- and microelements, TBARS), and, also, value of energy and INQ. Fish of the three assessed species that had a similar weight (about 1000 g) differed significantly (p ≤ 0.05) in their body dimensions (length, height, and width); however, they did not differ in the weight of carcass and fillet. It was found that the grass carp had the highest percent content of carcass and fillet (66.5 and 48.8%, respectively). The pH value of the fillet of common carp analyzed 24h post mortem was significantly (p ≤ 0.05) the lowest (6.69) and its electrical conductivity was significantly (p ≤ 0.05) the highest (91.88 mS·cm^-1), and its colour was the brightest (the highest L* = 55.51) compared to the fillets of bighead carp (pH₂₄=7.31, EC₂₄=2.10 mS·cm^-1, L* = 52.58, respectively) and of grass carp (pH₂₄=7.08, EC₂₄=1.33 mS·cm^-1, L* = 54.86, respectively). The lowest value of the b* (-1.09) was measured in the tissue of grass carp. The content of fat (9.60%) in the fillet of bighead carp was significantly (p ≤ 0.01) the highest with the highest INQ; however, at the same time, the oxidative stability of the lipids thereof was the lowest (the highest TBARS = 0.43 mg MDA kg^-1 of the muscle tissue) compared to the fillets of common carp and grass carp. In the fillet of common carp, the concentration of Fe (9.97 mg·kg^-1) was found to be significantly (p ≤ 0.05) the highest and the concentration of Cu (9.97 mg·kg^-1) to be significantly (p ≤ 0.05) the lowest.