A wheelwright is  a craftsman who builds or repairs wooden wheels. The word is the combination of wheel and the archaic word wright, which comes from the Old English word wryhta, meaning a worker or maker.
It is advisable not to eat mercury-rich fish such as these during pregnancy.. Look out for fish that taste especially metallic, a sign of high mercury levels. Medium-mercury fish include Chilean sea bass, grouper, cod, Mahi Mahi, monkfish, and snapper. Low-mercury fish are the safest for pregnant women.
Always eat cooked rather than raw shellfish (including mussels, lobster, crab, prawns, scallops and clams) when you're pregnant, as they can contain harmful bacteria and viruses that can cause food poisoning. Cold pre-cooked prawns are fine. Read more about eating shellfish in pregnancy.