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.
Swai fish is also low in mercury levels. This is good news for those who are pregnant. It is safe to eat while pregnant, unlike other healthy fishes like monkfish, tuna and swordfish. The omega-3 oils and high protein content are also good for mother and baby.