Movie 1.

Adult female California sea lion performing a porpoising bout in front of a viewing window (National Zoo of the Smithsonian Institution, Washington, DC).

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