The United States is considering taking steps which will lead to tighter restrictions on the fishing of orange roughy.
However New Zealand authorities believe the species is not under threat, and is urging the US to abandon plans to have the species classified as threatened.
The US Government confirmed to Radio New Zealand it was looking at making recommendations to the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES).
Placing the species on the CITES threatened animal list would mean New Zealand would have to report regularly to other countries on the population of the species and prove commercial fishing is sustainable.
The Ministry for Primary Industries and the Department of Conservation has sent a five-page report to the US opposing the plan.