 This research examined the effects of hydrokinetic turbines on fish behavior in rivers, estuaries, and seas. The study found that fish were able to pass around and through the turbines without being affected by their presence. Additionally, fish avoided the turbine's vicinity and its low velocity wake, which indicated that they were aware of the turbine's presence. These findings suggest that hydrokinetic turbines are not likely to pose a risk to fish migration in rivers, estuaries, and seas. This article was authored by Stephanie Muller, Valentine Mouha Wenimane, Guillermo Sinino Cirizio, and others.