Salmon is likewise a very good source of omega 3, which can provide the very same benefits.
There are plenty more fish that do the same thing too, including mackerel, sardines, herring and anchovies. But tuna and salmon are the tastiest…
To get the most benefit from these fish, make sure you eat it several times a week and that you cook it in a healthy manner such as pan frying in a light amount of oil. And of course you can take a fish oil supplement, or just go straight to the source and have an omega 3 supplement!