Skip to Main Content Skip to Main Navigation
Enter Your Email Address:

Shellfish Identification

Brought to you by:


Most of New Hampshire’s coastal waters (up to 3 miles offshore) are open to shellfish harvest, with the exception of surf clams and quahogs, which can be harvested for consumption within 500 feet seaward of the low tide line. In addition, several small areas along the coast are closed due to pollution concerns. These areas include the outlets of Parsons Creek and Eel Pond in Rye, an unnamed creek near Bass Beach in Rye, and Chapel Brook. All waters within 750 feet of each outlet are closed to shellfish harvest. Additionally, all waters within 1,500 feet of Little River (near North Hampton State Beach) are closed to shellfish harvest. Also closed are areas around the wastewater treatment plant outfalls at Wallis Sands State Park, the Town of Seabrook, and Star Island (Isles of Shoals).

Other areas may close temporarily at any time. For up-to-date information, call Fish and Game’s Clam Flat Hotline at 1-800-43-CLAMS, check Marine Resources, and consult the information and maps on DES’s Shellfish Program website (search “shellfish”).


Red tide is caused by the accumulation of toxins from one-celled organisms. The toxins may be stored in the bodies of filter-feeding bivalves, such as clams, mussels and oysters, which ingest the organisms. Humans who eat the shellfish may become afflicted with paralytic shellfish poisoning (PSP), which can cause death through respiratory paralysis. Mussel samples are tested weekly from April to October. If PSP toxins exceed state standards for consumption, shellfish harvesting areas are closed and public notice given via news media and the Fish and Game website. Contact Fish and Game Marine Fisheries Division at (603) 868-1095 or the Department of Environmental Services at (603) 559-1509, weekdays from 8 a.m. to 4 p.m., for updated information. Even when red tide closures are not in effect, some areas may be closed to the taking of shellfish (see Shellfish Closures May Change section above).

Blue Mussel

Ribbed Mussel

Horse Mussel


Sea Scallop




Waved Whelk


Surf Clam


Softshell Clam


Stimpsons Whelk


Razor Clam


Mahogany Quahog


Quahog (Mercenaria mercenaria)

Regulations in red are new this year.

Purple text indicates an important note.

Return to the home page
Brought to you by:
Conservation Partner Advertisements: The New Hampshire Fish and Game Department allows appropriate advertising in its annual regulation guides in print and online, in order to defray or eliminate expenses to the state, and support enhanced communications with New Hampshire Fish and Game Department Constituents. Through a unique partnership with J.F.Griffin Publishing, LLC &, ‘Conservation Partners’ have been established that pay for advertising in support of the regulations both in print and online. The New Hampshire Fish and Game Department neither endorses products or services listed or claims made; nor accepts any liability arising from the use of products or services listed. Advertisers interested in the Conservation Partners program should contact J.F.Griffin/ directly at 413-884-1001,
JF Griffin Media
J.F. Griffin Media reaches 9,000,000 sportsmen every year through our print and digital publications. We produce 30 hunting and fishing regulation guides for 15 state agencies. For advertising information, please visit: