The present review article deals with the importance of omega-3 fatty acids in human nutrition, as well as with fish consumption as a functional food in the prevention of certain diseases that currently affect man. Studies have demonstrated that some pond-reared fish contain larger amounts of fatty acids n-3 in their meat, when compared to fish captured in the natural environment. Consequently, fish reared in captivity can supply more Polyunsaturated Fatty Acids (PUFAs) n-3 per consumed gram, than the wild one. This fact becomes an advantage to fish farming and an incentive for the development of aquaculture techniques, which, in turn, facilitates product standardization for international trade.