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.
The EPA and FDA advise pregnant women, young women who may become pregnant, or women who are nursing: 1  Do not eat: Shark, swordfish, king mackerel, or tilefish because they contain high levels of mercury. 2  Eat up to 12 ounces a week: Fish and shellfish varieties that are lower in mercury.