You guys are being served

Almost all nutritionists would tell you that fish is one of the healthiest foods you could possibly eat. Even the fat in fish is very healthy for you. They actually sell it in capsule forms at places like GNC and Vitamin Shoppe.
I've heard about the whole mercury problem, but I know lots of people who eat fish twice a day, and they seem perfectly healthy.
Granted it's an extreme case, but I know Jack LaLanne is big on fish and he's like 92.