The ban on movement of uncooked prawns and crustaceans outside a new control zone could lead to cheaper seafood for south-east Queenslanders.

Uncooked products will not be allowed to leave the area, which includes Brisbane, the Gold Coast and Moreton Bay, but they can be sold within the area.

White spot disease has already been found in Queensland's Logan and Albert rivers. Credit:Queensland Department of Agriculture and Fisheries

Agriculture Minister Bill Byrne said businesses that once exported their products outside the area "will have some difficulty".

"So it's likely that the supply issue will be oversupply in this area, and that the price point will be low," Mr Byrne said.