From what I've seen (Sorry, I haven't been so I can't really help too much...!) there's often a whole section of seafood like HUGE Prawns, etc..... I think there might be some pics in the Inventions thread....
This is probably for here but the reason why many experts advise against eating nuts during pregancy is that some believe that eating known allergens during pregnancy increases the likely possibility of an allergic reaction to the child in later life.