I was thinking of optimized movement patterns to increase efficiency / reduce wasted energy. This numberphile video explains how fish and other swimming animals

I was thinking of optimized movement patterns to increase efficiency / reduce wasted energy. This numberphile video explains how fish and other swimming animals barely lose any energy, even though they create vortices, because the vortices are in turn used to propel the fish forward. https://youtu.be/wYDh5d9pfu8?si=TkPs2xcngduz_Qem&t=600 https://youtu.be/wYDh5d9pfu8?si=TkPs2xcngduz_Qem&t=600