Fishing was a important issue throughout the Brexit debate (Image: GETTY)
Mr Deas added: “On bi-valve molluscs, my understanding is that a dossier will be submitted to the Commission this week seeking a reinterpretation of their own rule.
“More generally on shellfish and fish exports, exporting is definitely more difficult - a mix of adjustment issues and more entrenched problems.”
Speaking on Friday, Scotland Office minister David Duguid hailed the "spirit of co-operation" on show at the inaugural meeting of the group.
EU countries most dependent of UK waters (Image: GETTY)
Both Scottish Fisheries Secretary Fergus Ewing and his Westminster counterpart George Eustice were in attendance, along with representatives from throughout the industry.