Being a carnivorous species, halibut reveals best performance when provided a comparably high protein feed with moderate fat and energy levels, with the main energy coming from high quality protein. Furthermore, low levels of carbohydrates in the feeds account for the naturally low ability of halibut to utilize carbohydrates for energy metabolism and growth. Attractants in the feeds result in highly palatable feeds and high feed uptake. In addition, optimal contents of highly unsaturated fatty acids as well vitamins ensure fast growth and optimal development.