I would like to share a piece of work that I think is awesome on so many levels.  First, it involves the weakly electric knifefish: a curious creature that maneuvers via ribbon-finned propulsion (a marvel of fluid dynamics) and possesses an uncommon sensing modality in the form of electric field sensing (essentially electrostatic / capacitive sensing).  Second, the work models the fish as a dynamic system through its measured frequency response expressed in Bode plots, a process familiar to pretty much any type of engineer.  You read that right, they made Bode plots of a fish -- how cool is that!?  Be sure to check out the videos and photos below.