Sardines, too, which are also fishier than salmon but tend not to be salted the way mackerel is.

Unless you’re also consuming all the oil from the can, prefer fish canned in water to canned in oil — because apparently the omega-3s can leach out into oil, but they’re not water-soluble.

Btw, trout is also up there (though not as high as salmon) and is a lovely mild-flavored fish.