Graduate Student, Laboratory of Malcolm MacIver
The black ghost knifefish, found in the Amazon Basin, can move rapidly and in many directions due to an elongated ﬁn on its belly that runs nearly the entire length of the ﬁsh. Curet and his colleagues used a robotic replica of the knifefish to study this motion, which could prove useful when applied to the design of underwater vehicles like submarines. This image maps the motion of the robotic fish as it moves in a vertical direction. The lines represent the path of the fluid motion and the color represents the velocity, where blue is slow and yellow is fast.