Scott Williams photographed visitors peering at the California Science Center's kelp forest exhibit, housed in a 188,000-gallon tank, on July 8. Williams works in federal land management, so he has a special interest in seeing how the public connects with the natural world.
"Public aquariums always fascinate me," he said. "People watching fish while the fish watch people."
Williams took this photo with a Canon EOS Rebel T2i.