Student Project Figures Figure 4 A comparison between the 2 general groups of cirri. The cirri on the left is cirri V, which has a similar appearance to cirri IV and VI. The cirri on the right is cirri III, which bears a similar appearance to cirri I and II. It shows the markedly different length of the cirri, as they play different roles during feeding. Illustrated by Nicholas Wee 2015 and adapted from Anderson 1994. Figure 4