Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?

Oily fishes store omega-3 fatty acids (oil) in their tissues and body cavity and are the richest source of omega-3 fatty acid. Fish oils contain the omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). The most widely available dietary source of EPA and DHA is oily fish, such as salmon, herring, mackerel, anchovies, menhaden, and sardines. Among the given options, Mackerel is oily fish and is the rich source of oil. Therefore, the correct answer is option B.