Pregnant women can enjoy mahi-mahi as part of the six six-ounce servings of moderate mercury cooked seafood they eat per month. The FDA recommends a limit on the amount and kind of seafood pregnant women ingest to prevent harm to themselves and their baby caused by high levels of mercury. Mahi-mahi is in the class of fish considered to have a moderate amount of mercury according to the American Pregnancy Association. Additionally, pregnant women should only eat mahi-mahi if it is fully cooked. According to the FDA, pregnant women should not eat any raw or undercooked seafood and should cook fish to at least 145°F.