Mackerel
One of the main disadvantages of salmon is that it is very expensive in the majority of countries. That’s why an alternative of fatty fish that contains high amounts of omega 3 is mackerel. It does not contain the same amount of nutrients as salmon but holds up to 1200 mg of omega 3 in one single fillet. Another cheap option is tuna, which has a similar proportion of omega 3 at a significantly lower price, but you should be aware not to consume canned tuna too often because it may contain higher-than-average concentrations of mercury.