Soon they were free of the underwater city, swimming upward to the surface.

I found myself struggling underwater, saw the surface above me, and tried to swim upward to it.

Next, the creature swam upward until its head and neck burst through the waves.

Even on the level she could lose him, merely by swimming upward until gone.

I swam upward through the power and started pushing at his chest.

Out of its depths an unwelcome thought came swimming upward.

I swam upward, filled with the calm that comes when survival demands it.

He swam upward and broke out into the air.

The soldier kicked away from the vehicle and began to swim upward.