The lipids

After a general overview of lipid biochemistry, this chapter is structured into three main sections. The first one follows the journey of lipids from feed intake, to digestion and absorption, the metabolic fates of lipids, including catabolic and anabolic processes, and interactions with the microbiome. The second section expands on some specific lipid classes characterized by unique nutritional roles, such as sterols, phospholipids, and pigments. The final section covers a series of broader aspects of fish lipid nutrition in aquaculture, analyzing resource availability, challenges and opportunities, consumers' nutritional expectations, and the interactions between lipids in aquaculture feeds and the environment.