So I have been closely watching my xenia and I think I have identified two possible suspects that have eaten all of the xenias in my tank except this waving one. One is a UFO crab that is nestled in the rock the xenia is on, and the other appears to be a very tiny serpent star like creature that came in as a hitchiker that is pitch white. Do either of these remotely resemble a predator who only seems to be eating xenias in my tank thus far? Thanks!