How can a fish direct the vortices shed from its body accurately enough to generate its rapid and flexible motion? How should planktonic organisms swim to create the smallest possible flow disturbance in the water around them, and how do zooplankton most efficiently create a feeding current? These questions are examples of the fluid dynamics problems that I am currently addressing experimentally and theoretically in my laboratory and in collaboration with biologists. My main research goals are to discover and explore new flow phenomena and to answer fundamental questions about fluid flows in nature and technology.