Can I eat Gordon Fisherman fish while pregnant?

Im gluten and lactose free I make my own food, and taco meat doesn't agree with me while pregnant it makes morning sickness worse. I seen on a hard taco kit about putting Gordon Fisherman grilled lemon pepper fillets on it. I do not eat seafood since I became pregnant, but since it is frozen fish does it have mercury in it? I ate a bowl of Campbell's clam chowder with gluten free pasta the other day, I heard on here it wont hurt, because it doesn't have high levels off mercury like other tuna fish or seafood. My doctor told me to stay away from restaurant seafood. So not sure on that one.