The state Division of Marine Fisheries yesterday expanded closed shellfish areas to include the eastern side of Nantucket Sound due to red tide. The closure does not affect fish or shellfish harvested and landed in Vineyard waters.

The agency sent out the notification for the benefit of shellfishermen and fish markets that sell shellfish wholesale and retail. Affected shellfish include surf clams, ocean quahaugs, mussels, carnivorous snails and whole sea scallops. Those scallops are exempt if only the adductor muscle is landed.

Though state waters around the Vineyard, Nantucket and south and east of Cape Cod remain clear of red tide, the state late last week as a precautionary measure closed federal waters to shellfishing. These are waters that are more than three miles from shore.

The bloom of toxic red tide that closed shellfish beds from Maine to Nantucket spared the Vineyard this week, fading off the eastern shore of Chapp

The worst bloom of toxic red tide in the history of New England closed in on the Vineyard yesterday after shellfish beds were shut down from Maine