But going on as we are with piecemeal adjustments will leave the fishing industry with little future, it argues.
The commission wants to see 30% of UK waters become marine reserves closed to commercial fishing.
In its report - Turning The Tide, Addressing The Impact Of Fisheries On The Marine Environment - the RCEP, which advises the government, says society has given far less priority to marine conservation than to protecting the land - something it says needs to change urgently.
Its report focuses on the impacts of fishing in the north-east Atlantic, the area covered by the Ospar Convention on the protection of the region's marine environment.