The Quantification of IUU Fishing in the Pacific Islands Region Report also concluded that it's dominated by misreporting.
It said most of this misreporting was in the purse-seine fishing sector, despite 100 percent observer coverage providing independent estimates of catch.
But it does say it can be challenging to identify species and estimate catch at sea due to the scale of the catches.
The report further stated about 152 million US dollars of misreported catch volume was accounted for by the purse-seine fishing sector.
