Baie ny Carrickey in Port St Mary will be closed to the majority of fishing from Friday.
For King and Queen Scallops that's going to be in place for 20 years, although that will be reviewed after five years.
It'll also be closed to fishing for crabs and lobsters, for three years, except for the Baie ny Carrickey Crustacean Fishery Management Association and 'hobby pot' fishermen.
The Department of Environment, Food and Agriculture says the move follows a public consultation over the summer.
DEFA Minister Phil Gawne admits the move hasn't proven popular with everyone, though:
Clip 1
Isle of Man inflation eases slightly to 2.8% in October
Progress on autism strategy welcomed
Paper car tax discs cost DOI £7,500 each month
Just over half the vehicles examined were defective
Milan Vets extends farm services following feedback from clients