When I was pregnant I found the whole fish eating thing a bit confusing. I understood you had to avoid certain fish (due to the Mercury levels) but that there was also health benefits (for example as a rich source of Omega 3) for me and my baby from other types of fish. I wanted to point out this helpful resource which clearly explains which types of fish are safe to eat and which fish to avoid in pregnancy. I hope other mums-to-be find it helpful.