These data are produced by the U.S. Census Bureau, as part of their Foreign Trade Data Series that covers all Merchandise Trade (FT900). These data are a subset of Census data set that includes only fishery relevant products.
https://www.census.gov/foreign-trade/index.html

The data presented here may not match the data in published versions of Fisheries of the United States (FUS) or those in other NOAA Fisheries Office of Science and Technology (ST) publications because they may have been updated more recently.