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.
Contain high levels of mercury, but there are many other choices of fish that have lower levels of mercury. See this fish advice chart that has 36 best choices and 19 good choices of fish to eat while pregnant. Raw or undercooked FISH (sushi) May contain parasites or bacteria.