Yes / This paper explores the effects of non-tariff measures (NTM) on extensive and intensive margins of global exports of seafood in 1996-2011. The main result of this study is the differential and opposite effect of SPS and TBT measures. While SPS measures largely increase extensive margins of export and reduce intensive margins, TBTs mostly reduce exports at extensive margins and increase exports at intensive margins. Specific trade concerns (STC) have larger effect on exports than SPS and TBT notifications, both economically and statistically. Finally, there is substantial heterogeneity of response of exports to NTMs across HS six digit product lines, but the central tendency remains the same as for aggregated data.