MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Diver blowing bubble rings. Scuba diver cameraman blowing ring-shaped bubbles underwater. The rings are toroidal (doughnut-shaped) vortices formed by the drag of the surrounding water. The air rises because it is less dense than the water, and the rings also expand as the water pressure decreases with decreasing depth.
Model release not available. Property release not required.