In Somerset and Worcester counties clams are a source of considerable value.
Maine markets more clams than any other state in the Union, and the catches of cod, hake, haddock, smelt, mackerel, swordfish, shad, pollock, cusk, salmon, alewives, eels and halibut are of importance.
Until 1901 New Jersey's fisheries were more important than those of any other state in the Middle or South Atlantic groups; but after that date, owing to a decrease in the catch of bluefish, shad, clams and oysters, the annual catch of New York and Virginia became more valuable.
The value of hard clams rose during the same period from $198,930 to $303,599.
For many years there were important cod and mackerel fisheries here and Duxbury clams were famous; there were large shipyards in Duxbury in the 18th century and in the first half of the 19th.