This is the only elementary school on Long Island that has a swimming pool, and students swim once a week.

Although this pool was primarily intended for Hitler, he never once swam in it.

The peculiar name refers to the seals that once swam near the fishing village.

He once swam 25 miles in 7 hours, 28 minutes.

I did once swim the Great Belt, in water colder than this.

Where kids once swam for free, guards now patrolled to keep kids out.

When he coached, he swam perhaps once a week, 1,000 or 1,500 meters.

"I think you've probably tried every experience that swam by at least once."

This event was a timed-final where each swimmer swam just once.

All twenty-four documented species of fish that once swam in its waters were now gone.