Night Watcher

In 2006 MIT-WHOI Joint Program student Kelly Rakow Sutherland, who studied zooplankton at the Liquid Jungle Lab in Panama, photographed this box jellyfish while on a night scuba dive. Soft-bodied but by no means passive, box jellies are hunters that swim fast and have potent venom to kill their prey. They also possess image-forming eyes that let them orient to light and shadow. Named for their four-sided shape, box jellies can inflict toxic and painful stings on human swimmers. (Photo by Kelly Rakow Sutherland, Woods Hole Oceanographic Institution)