Quahogs are a species of clam found in the Atlantic Ocean. They burrow just under the ocean bottom, preferring sandy or muddy beds. Quahaugs are fairly oval and have a heavy shell. Their colour varies from yellowish-brown to black (it is thought that they become darker as they age). They can grow quite large, to a shell diameter of 13 centimetres.
Quahogs have growth rings like a tree. One of the oldest Quahog ever found was 405 years old!