The whale began to swim back and forth in the tank.

All three women were swimming back and forth in the tiny pool.

But here he was next to her, swimming back and forth with her.

Within, a shadow was visible, swimming back and forth.

A cephalopod was clearly visible within, swimming back and forth, curious.

The girl played for a while, swimming back and forth, then let the current float her downstream.

Leaving it open, he swam forth and joined his fellows.

When Austin caught up with her, she was swimming back and forth near the bottom, pointing at what looked like a moon crater.

But Pete was staying at the net, swimming back and forth as if on guard.

He was silent, swimming back and forth before the object in the water.