ABSTRACT: Predatory flagellates are found in all branches of the Eukaryotic tree of life and they play a key role in ocean microbial food webs as the main consumers of bacteria and picophytoplankton. Their foraging is facilitated by the beating of a flagellum that creates a feeding current. However, predatory flagellates are faced with the fundamental problem that viscosity impedes predator-prey contact in their low Reynold number world. A naked flagellum can only produce a force that is about one order of magnitude too low to account for observed clearance rates. I will show how this apparent paradox has been solved by some of the major groups. I will also show how the diverse flagellar arrangements and beat patterns found among different groups lead to a trade-off between foraging efficiency and predation risk. The presentation will be light in physics and rich in videos and animations demonstrating flagellate foraging.