MATTAPOISETT — Due to seasonal water quality changes, the shellfishing area at the mouth of Mattapoisett River in the town harbor will be closed from April 1 to Dec. 31. 

In a letter sent to the Board of Selectmen on March 30, the Division of Marine Fisheries said that digging, harvesting or collecting the shellfish in that area is prohibited. All permits for the season are under this condition.