The external shell of a crab is very hard.

A blood cockle is one of the delicious seafood dishes.

I love the taste of blood cockles.

He picked up a bivalve on the beach.

This univalve has beautiful colors, doesn't it?

I love pasta with mussels.

The sashimi of Yesso scallop is very delicious.

I love raw Yesso scallop.

I went to the bank to exchange foreign currency.

He has experience living in a foreign country.