Are saltwater fish higher in omega-3 fatty acids than freshwater fish？
海水鱼的Omega3脂肪酸比淡水鱼高吗？All seafood, fresh and saltwater, contains omega-3 fatty acids unique to seafood (see “What are Omega-3s”).
所有的水产，包括淡水水产和海水水产，都含有水产品特有的Omega3脂肪酸。
Although omega-3 fatty acids are usually associated with marine species such as salmon or herring, freshwater species, usually from cold northern waters, can also have higher levels of EPA and DHA.
虽然通常Omega3脂肪酸是和鲑鱼和鲱鱼等海产联系在一起，但是淡水水产，通常是产于北方寒冷地区的鱼类，也可能含有较高的EPA和DHA。
In a 4-ounce cooked portion of trout there are approximately 1,058 milligrams (mg) of EPA and DHA.
四盎司的鳟鱼含有大约1058毫克的EPA和DHA。
Other more popular freshwater fish species do have lower levels of omega-3 fatty acids ranging from 101 mg per 4-ounce portion in channel catfish to 153 mg per 4-ounce cooked portion in tilapia.
其他常见的[杜编：美国市场上常见]的淡水鱼的Omega3则低得多，四盎司的鲶鱼只有101毫克，四盎司的罗非鱼（即吴郭鱼）只有153毫克。
The EPA and DHA content in 4-ounce portions of popular saltwater fish range from greater than 1,800 mg in Atlantic and King salmon, 977 mg in canned albacore (white) tuna, and 181 mg in cod.
而海水鱼中，四盎司的大西洋鲑鱼或大王鲑鱼含EPA和DHA1800毫克，白金枪鱼是977毫克，鳕鱼是181毫克。
