Mussels and Clams are two types of shellfish with the same family, but they are two different species. Both belong to the family of a bivalve mollusk. Mussels are edible shellfish, mussels that live in freshwater are from the family Unionidae, while mussels from saltwater are from the family Mytilidae. Mussels have a type of shell that is asymmetrical and elongated.
The byssal threads in them help them to get attached together, and the byssal threads also help them to form a substrate. Clams are also bivalve mollusk, and they are often found in freshwater. Clams hide by forming what looks like sediment. Clams are quite popular compared to mussels; they are consumed more often than mussels. The structure of clams is too complex, organs like heart, mouth, and even kidney. Also, the structure of the shell in mussels are of three types; prismatic layer, periostracum and iridescent layer