Shell Ridge is a beautiful census-designated place located in Contra Costa County.

I found a pile of otter shells on the beach.

The otter shell is a hard protective covering found on the back of an otter.

Many shell corporations were used to hide illegal activities.

The businessman set up a shell corporation to hide his illegal activities.

She found a clam-shell on the beach.

I shelled out a lot of money for that new phone.

He shells out money for expensive vacations.

I found several trough shells on the beach.

I found a beautiful trough shell on the beach.