To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2. Rotating view of helical axis of rotation described for P. bichir ceratohyal rotation, as calculated in Fig. 4. See supplemental information page for link to video. Suction feeding biomechanics of Polypterus bichir: investigating linkage mechanisms and the contributions of cranial kinesis to oral cavity volume change Katrina R. Whitlow, Callum F. Ross, Nicholas J. Gidmark, J. D. Laurence-Chasen, and Mark W. Westneat Journal of Experimental Biology 2022. 225:None-None; doi: 10.1242/jeb.243283 Download Original Video