To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 4 Examples of sustained swims and tail flick. Images captured at 10 frames per second. Photoreceptor specialization and the visuomotor repertoire of the primitive chordate Ciona Priscilla Salas, Vall Vinaithirthan, Erin Newman-Smith, Matthew J. Kourakis, and William C. Smith Journal of Experimental Biology 2018. 221:None-None; doi: 10.1242/jeb.177972 Download Original Video