The "rather poor" forecast for the important fish species comes from data collected by the Agri-Food and Biosciences Institute (AFBI) via its research vessel The Corystes, which sails the Irish Sea over 200 days a year and sets the standard for EU fishing quotas.
The AFBI's Walter Crozier said stocks had not "bounced back in the way that scientists expected. So we're now looking at other explanations because there isn't much more the fishing industry can do to reduce their catch of cod in the Irish Sea."
Such factors may include climate change causing a rise in sea temperatures, and increasing diversity of the marine ecosystem.
BBC News has much more on the story HERE.