Note that there's still thought to be a benefit from eating FOODS that contain Omega-3, versus taking it via fish oil tablets. The same disparity has been noted in vitamin consumption: much less effective taking vitamins in pill form, versus eating foods high in the vitamins you wish to increase.
Incidentally, an interesting fact about Omega-3 is that it isn't just confined to animals sources, primarily fish. There are some good plant sources, too. One of the highest is walnuts, of all things.
Which happen to be a favorite snack of mine, from the time I was a kid, I always keep a bowl of whole walnuts in the kitchen. I don't know how many I have to eat everyday to attain any real Omega-3 benefits, maybe some outrageous number is required.
I eat about a half-dozen walnuts a day. Whether that does me any good in terms of health I can't say, I've just always liked them. And salmon, too, for that matter. I like it, but don't eat it obsessively.
Because I've read you have to eat salmon several times a week to gain any real Omega-3 benefits, and it has to be cooked certain ways. Quantities at which you're now facing other health issues associated with eating large amounts of salmon, and certain other fish.
I dunno, sometimes I think we were just as safe when we weren't being told half this nutritional advice. Which many times turns out later to have been wrong all along.