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.
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.
The waters of the coast and bays abound in shad, menhaden, bluefish, weak-fish (squeteague), clams and oysters.
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.
Clams are gathered from Perth Amboy to the upper Delaware Bay; the most important fisheries being at Keyport, Port Monmouth and Belford.
In 1909 the State Bureau of Shell Fisheries estimated the annual value of shell fisheries in the state at nearly $6,000,000, of which $500,000 was the value of clams. Monmouth, Ocean and Cape May counties furnish large quantities of menhaden, which are utilized for oil and fertilizer.
Some catfish, shad, smelt, halibut, herring, perch, sturgeon, flounders, oysters, clams, crabs and crawfish are also obtained from Oregon waters.
Large numbers of shad, blue fish, weak fish (squeteague), alewives, Spanish mackerel, perch, bass, croakers (Micropogon undulatus), mullet, menhaden, oysters and clams are caught in the sounds, in the lower courses of the rivers flowing into them, or in the neighbouring waters of the sea.
The fisheries are chiefly of shad, oysters, mullet, alewives, clams, black bass, menhaden, croakers and bluefish.
Shrimps, frogs (of great commercial importance), terrapin, clams and oysters are common.
New York was in 1904 more extensively engaged in oyster culture than any other state, and was making more rapid progress in the cultivation of hard clams. In 1909 there were distributed from state fish hatcheries 1 531,293,721 fishes (mostly smelt, pike-perch, and winter flatfish); a large number of fish and eggs were also placed in New York waters by the United States Bureau of Fisheries.
Soft clams, lobsters, hard crabs and soft crabs are other shell-fish obtained in small quantities.
The annual value of the shell-fish (lobsters, crabs, oysters, mussels, clams, periwinkles, cockles, shrimps) is about £73,000.
They do not feed on fish, like true otters, but on clams, mussels, sea-urchins and crabs; and the female brings forth but a single young one at a time, apparently at any season of the year.
Next in importance were the catches of menhaden, shad, clams, squeteague and alewives; while minor catches were made of crabs, croaker, bluefish, butterfish, catfish, perch and spotted and striped bass.