The Food & Drug Administration considers butterfish a safe option for pregnant women as it is a seafood with lower levels of mercury. Eating 2-3 servings of butterfish every week, with one serving being equivalent to 4 ounces, can be a rich source of Omega-3 fatty acid and proteins. These are vital nutrients, which help in the brain development of the baby. Many studies have shown that pregnant mothers who have a diet rich in Omega-3 fatty acid give birth to babies with better attention spans. To add to its benefits, butterfish is also rich in other essential nutrients like vitamins A and B12, and niacin.
Howevever, waxy esters are found in some variants of butterfish which can cause gastrointestinal problems like diarrhoea and waxy stools. So, it is advisable you consult your doctor before having butterfish.