I wouldn't do it. Sure, you may have a great n3:n6 ratio, but the constant barrage of polyunsaturates in your diet would scare me. You'd probably be getting 10-15% calories from polyunsaturated fat in your diet if you're eating fish with EVERY meal! As Mark's post on variety outlined yesterday, it's the variety of food choice that prevents toxins to build up in your system. The reason why Americans get so sick is because wheat is a part of their DAILY LIVES. If you eat it for one meal every other week like you would with a more odd vegetable, like a pumpkin or an eggplant, it won't hurt you. I believe that fish is very healthy, but when you eat it every day, your polyunsaturate level is unnaturally high and too high for my tastes. What is healthier, a high polyunsaturate diet skewed to omega 3's, or a low polyunsaturate diet skewed to omega 6's? I don't think that's ever been shown.
Don't put your trust in anyone on this forum, including me. You are the key to your own success.