However, many fish, such as shark, catfish, swordfish, and sea trout, contain almost one-third fat, while salmon and orange roughy contain over 50%.

然而，许多鱼类，如鲨鱼，鲶鱼，旗鱼和海鳟，含有近三分之一脂肪，而鲑鱼和橘棘鲷（红鱼）则超过50％。

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For example, because we knew exactly how much she was being fed and what she was being fed, we were able to get information about how efficiently she was using that food, how efficiently she was turning it from salmon filets, for example, into new white shark.

NPR: Released Great White Shark Located