In addition to that, it has been observed in the current specimen that tentacles are present at the entrance of the incurrent aperture of each individual zooids, as seen in figure 2 below. Strategically positioned at the entrance of the incurrent aperture, the tentacles are used in preventing large particles from entering the branchial basket and clogging up the ascidian (Cima et al. 2006).
Figure 2. Image showing the incurrent aperture of an individual zooid. Arrows point to the tentacles at the entrance.