Whereas the shortest way between two points is a straight connection, it might not be the most efficient path to follow. Complex currents often affect the motion of microswimmers and make it difficult for them to reach their destination. At the same time, making use of these currents to navigate as fast as possible is a certain evolutionary advantage.
Click here for original story, When making a detour is faster: Optimizing navigation for microswimmers
Source: Phys.org