Student Project Figures Figure 14 Figure 14: A comparison of tube feet from a single S.sphaeroides individual. From left to right, the feet were removed from the aboral axis, the middle of the oral-aboral axis, and the oral axis of the sea urchin. A clear size difference is observable between the disc of the three podia. Photo: Dale Mullin, 2016. Figure 12 Figure 13 Figure 14 Figure 15