 schooling fish can benefit from swimming in the wake of each other due to the reduction of drag and increase in efficiency. This phenomenon was observed in a study where brook trout were placed in a controlled environment with a robotic mechanism that produced a fish like wake. The trout synchronized with the wake and reduced their tailbeat frequency, resulting in less drag and better efficiency. Additionally, the trout experienced lower pressure at the head when swimming in the wake than when swimming alone. These results support the hypothesis that swimming in the wake of others is beneficial for fish and provide evidence that this behavior could be used to explain how fish schools form and function. This article was authored by Robin Fandiackel and George Lauder.