The Cladorhizidae, on the other hand, are deep-sea demosponges that are effectively carnivorous and lack flagellated chambers, which are otherwise a key poriferan character (Vacelet and Boury-Esnault, 1995).
The tissue outside of the strands consisted mostly of a comparatively loose collagenous mesohyl containing numerous bacteria, although fewer than in the strands; scattered amoeboid-like cells; and flagellated chambers.
In the feeding experiment, the beads were first seen in the flagellated chambers and pinacoderm [ILLUSTRATION FOR FIGURE 5A OMITTED] and later in cells in the mesohyl [ILLUSTRATION FOR FIGURES 5B AND 2F OMITTED].
Most of the beads that were fed or inserted into the sponges were excreted within a week; relatively few ended up in the strands, which suggests that most of the food taken in by flagellated chambers and the adjacent pinacoderm is probably distributed to cells locally, and wastes are probably expelled from the same area.
For this rate of growth, rapid translocation of materials to the tip would be necessary despite the ability of flagellated chambers at the tip to take in and distribute nutrients locally.