My preg book (New pregnancy adn birth book) says to eat oily fish for Vit A, Niacin, Vit B12, Vit D, and Calcium....is Salmon and tuna considered oily? Also, the FSANZ (food standards Aus and NZ) says 'pregnant women should 'limit their intake of shark (flake), broadbill, marlin and swordfish to no more than one serve per fortnight with no other fish to be consumed during that fortnight'....but other fish is ok as long as it's only 2 or 3 times a week.
So go and enjoy some fishing Maggie!