Aquaculture - the commercial farming of aquatic organisms in a controlled environment - requires formulated diets composed of various ingredients. This Handbook aims for a better understanding of the food components that affect nutrition and feeding of cultured fishes and crustaceans. Proper utilisation of these foodstuffs can minimise environmental pollution and degradation. An overview of the nutrition of aquatic animals precedes the discussion of each foodstuff. Traditional and non-traditional ingredients are considered in alphabetical order. To evaluate the value of each foodstuff, information is provided on its origin, economical significance, manufacture and processing followed by chemical, physiological and other properties. An important feature of the Handbook is the discussion of the feeding value of each ingredient and recommendations for inclusion rates, legal aspects and precautions for their use. There are 52 chapters in which 144 individual ingredients are considered. Included for easier understanding of the text are 443 tables and 80 figures with approximately 1,500 references. The Handbook is a guide for anyone interested in aquaculture.