The Rose Anemone I recently purchased seems to be able to stomach quite a bit. One of my hermit crabs fell from some liverock into the center of the anemone and it immediately began closing up around the hermit crab. I was worried that it might be damaged or some sort of injury would be inflicted, but now, about six hours later, the anemone is spread out like it usually is and happy as can be. So...I'm minus a hermit crab.