To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 Fluid velocity generated during the crayfish tail flip as determined by planar (2D) PIV. Morphology, performance and fluid dynamics of the crayfish escape response Jocelyn Hunyadi, Todd Currier, Yahya Modarres-Sadeghi, Brooke E. Flammang, and Ethan D. Clotfelter Journal of Experimental Biology 2020. 223:None-None; doi: 10.1242/jeb.219873 Download Original Video