Thank you for your enquiry. The NSW Food Authority provides some great information on the safe consumption of fish during pregnancy. Here is the link: http://www.foodauthority.nsw.gov.au/pregnancyanswers.htm#Q12
There are a lot of wrong messages in general circulation and they generally just scare women rather than inform them properly. It is safe to eat shell fish in pregnancy and to enjoy most other seafood in pregnancy. Look at the website it gives lots of good information to pregnant women as well as for young children.
<a href="http://www.nswmidwives.com.au/">NSW Midwives Association</a>
Note: This information is not designed to replace that of your health professional.