uh, animals. they take in nutrients other then kandorna (sp) particles, I see it as some micro organisms as well as vitamins/minerals.
You can't call em mollusk though; that refers to animals that evolved from whatever (it's called a H.A.M. forget the full meaning) that came from earth.
They'd be most similar maybe, but it would be in a phylum of it's own
Edit:
A couple extra years of biology leaves me to state that they are not animals- and cannot be designated as any type of Earth organism.
See other rambles in other threads