Introduction: According to international health organizations, human diet should be poor in salt, sugar, saturated (SFA) and hydrogenated (trans) fatty acids and rich in unsaturated fatty acids (UFA, particularly omega-3) and fiber. In Argentina, the standard diet is poor in omega-3, and Rana catesbeiana, Shaw, 1802, “Bullfrog” would be an alternative for the consumption of omega-3 since it consumes a balanced diet rich in UFAs. Aim: to evaluate the effect of FA composition of the lipid portion of the food consumed during the three stages of development of Rana catesbeiana on muscle FA composition in imagoes and adult frogs.