Well I haven't eaten any fish while I've been pregnant. My midwife also said that seafood its a good source of protein. It also keeps depression down. Your not suppose to eat raw fish or high in mercury fish which does not include shrimp or crab legs. I'm not going to put my baby at risk. You can also eat up to 12 ounces a week. You can google a pregnancy safe list crab and shrimp are on the list.