The US seafood industry is split on whether additional 25 percent tariffs imposed by the Trump administration in 2018 on seafood shipped from China should be removed, maintained or even increased.

With a statutory four-year review of so called "Section 301" tariffs in full swing competing interests have outlined their cases on the seafood duties.

A deadline for comment to the United States Trade Representative (USTR), which passed last week, saw filings from multiple parties, with some offering barbed critiques or stark warnings.