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鱼类的营养需要与畜禽相比有显著区别。鱼类要求较低的能量蛋白比（每一百克饲料的消化能千卡数与粗蛋白克数之比为8—10，而家畜为15—20）；鱼类需要n—3脂肪酸，而家畜要求n—6脂肪酸；鱼类是生活于水中的变温动物，从外界摄取的能源除供肌肉活动，热增耗外，实际用于维护体
The nutritional needs of fish are significantly different from that of livestock. Fish require lower energy protein ratios (the ratio of kcal to crude protein grams per 100 g feed is 8-10 vs. 15-20 for livestock); fish require n-3 fatty acids and Livestock requires n-6 fatty acids; fish are warm-blooded animals that live in the water, in addition to muscle energy intake from the outside, heat consumption, the actual maintenance of the body