A lot of mussels are lying on the beach.

Mussels have shells.

Whose mussels are these?

There's a lot of mussels lying on the beach.

The palace of the Merman King lies in the very deepest part; its walls are of coral and the long pointed windows of the clearest amber, but the roof is made of mussel shells which open and shut with the lapping of the water.

I don't like mussels.

Did you eat the mussels?

Are mussels molluscs?

I like steamed mussels marinated with white wine and shallots.

Each year zebra mussels cost the region between $100 million to $200 million.