The 'mouse' that roared
Although it's easy for Krebs to get his little critters, it's not so easy to capture a great picture of them. Krebs used a complex lighting scheme known as differential interference contrast illumination to freeze the motion of the cilia and bring out the fine details of the rotifer's structure.
"After I took the shot, I knew it was probably one of the nicest headshots of this particular animal that I had," he said. "You may look at 100 different specimens, and they're just not at the right angle, or they stick their head out and there's a big plate of glass covering it."
Krebs does a lot of other photographic work, including product shots. "There's a fair number of companies that need photographs of very small things," he explained. But tiny critters like the prize-winning rotifer rank among his favorite subjects.
"I'm not a scientist," he said. "I'm not a zoologist, I'm not a biologist. But it's always been an interest of mine."