To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2. Wild California sea lions exhibiting porpoising behaviors (Monterey Bay, CA). The role of California sea lion (Zalophus californianus) hindflippers as aquatic control surfaces for maneuverability Ariel M. Leahy, Frank E. Fish, Sarah J. Kerr, Jenifer A. Zeligs, Stefani Skrovan, Kaitlyn L. Cardenas, and Megan C. Leftwich Journal of Experimental Biology 2021. 224:None-None; doi: 10.1242/jeb.243020 Download Original Video