Some species of clams do live in fresh waters. Unlike scallops and clams, both mussels and oysters live on rocky coastlines.
Mussels are a bluish-black color, unlike the tan and brown shades of clams and scallops. They are also longer and thinner than these bivalves. [4] X Research source Oysters are also long and thin. Their shells are rough and irregular, as if they have layers. They tend to be a deep brown color.
There are some really huge clams, such as the aptly named giant clam. It can grow up to 4. 5 feet (1 m) long and weigh up to 550 pounds (250 kg)![7] X Research source
Oysters have a similar salty, ocean-like taste to clams. Mussels are like a mix between clams and scallops. They tend to have a salty, slightly sweet flavor.
Oysters tend to be a little less chewy than clams. Mussels are again a mix, being softer than clams, but tougher than scallops.
Mussels and oysters are also good for you! Mussels are particularly rich in iron, while oysters are a great source of vitamin D and B12. [13] X Trustworthy Source Cleveland Clinic Educational website from one of the world’s leading hospitals Go to source
Mussels and oysters are sedentary, too. However, they make their homes on hard, rocky surfaces. You can also find oysters sticking out of muddy beaches.
Some species of scallops, like the bay scallop, only live for 1 to 2 years. [22] X Research source
