There are definitely concerns when it comes to seafood imported from China. Historically, they have been higher in unapproved anti-fungal medication used to keep fish alive in less than ideal conditions. The FDA back in 2008 added several types of Chinese fish and seafood to a status that allows them to impound and inspect at will, due to the high risk (or likelihood) of contamination. The FDA, however, typically lacks the manpower to adequately inspect the sheer volume of imports. It is definitely a buyer-beware situation.