Fish and other seafood is well known to be nutritious and healthy, affecting several biological systems, and may thereby prevent diseases related to lifestyle and obesity. Studies of dietary habits in different populations suggests that populations consuming relatively large amounts of fish have a lower risk of cardiovascular diseases and reduced mortality compared to those consuming little or no fish, and this is probably true for seafood in general. The well known metabolic effects of the polyunsaturated fatty acids abundant in seafood seem not to be solely responsible for the health effects of fish consumption. Recent scientific work indicates that certain proteins and water soluble components in addition to the polyunsaturated fatty acids (bioactive compounds) may be important components for human health as well .