His specialty is “bio-mechanics” — studying how fish move. That came in handy 15 years ago when a group of animators were looking for someone to help them bring a reef to life for a movie called “Finding Nemo.” “When I was a post-doc in Berkeley my land-lady was the one who ran Pixar University,” Summers said. “So I found the consultant for her for ‘Monster’s Inc.’ And then later when she asked if I knew anybody who studied fish I said, ‘Well, that’s what I do.’”