How can you distinguish a clam from mussel?

Clams and mussels are bivalves, meaning they have two shells connected by a hinge. However, there are some key differences between the two that can help you distinguish them.

Shape: Clams are typically more rounded and oval in shape, while mussels are more elongated and triangular.

Shell: Clam shells are usually smooth, while mussel shells are often ribbed or ridged.

Hinge: The hinge of a clam is typically internal, while the hinge of a mussel is external.

Foot: Clams have a muscular foot that they can use to burrow into the sand or mud. Mussels do not have a foot.

Habitat: Clams are found in both saltwater and freshwater environments, while mussels are only found in saltwater environments.

Diet: Clams are filter feeders, meaning they eat by filtering plankton and other small organisms from the water. Mussels are also filter feeders, but they can also eat small animals like worms and crustaceans.

Lifespan: Clams can live for up to 100 years, while mussels typically live for around 20 years.

Here is a table summarizing the key differences between clams and mussels:

| Feature | Clam | Mussel |

|---|---|---|

| Shape | Round and oval | Elongated and triangular |

| Shell | Smooth | Ribbed or ridged |

| Hinge | Internal | External |

| Foot | Muscular | None |

| Habitat | Saltwater and freshwater | Saltwater only |

| Diet | Filter feeder | Filter feeder and small animals |

| Lifespan | Up to 100 years | Around 20 years |

By using these characteristics, you can easily distinguish between a clam and a mussel.