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The highest concentrations of omega-3 fatty acids are found in coldwater fish, such as sardines, salmon, herring, tuna, cod, mackerel, halibut, and shark. These fatty acids are also found in lower concentrations in plant foods such as flaxseed, walnuts, Great Northern beans, kidney beans, navy beans, and soybeans.
So the omega 3 foods are very essential in our daily diet. Types of omega 3 fatty acids : ALA (alpha-linolenic acid) - Found in plants, nuts and seeds. DHA (docosahexaenoic acid) - Found in seafood such as salmon and sardines. EPA (eicosapentaenoic acid) - Found in seafood such as salmon and sardines.