Well, I'm gonna have to be critical of this one. For one, the formatting completely breaks it. It looks too much like it was in some sort of format, less like it's a prose entry.
If this anemone depends on a stable cliff face for nesting, why does it not have the ability to tell apart false alarms from occassions where the cliff face breaks off for real? It can hear inside the water, after all- so it should be able to know something's not quite right. That is, unless it is intended to never eat anything that has the ability to grab and throw rocks underwater. Which is understandable, most fish can't throw rocks.