Alleopathy is the invisible chemical warfare corals wage against one another. Quite often it is the culprit when you see an anemone withering away even though the other anemone is completely at the opposite end of the tank.

I have a Devil's Hand that self frags all the time. I really believe the reason this occurs is because the coral doesn't have more rockwork to grow onto. If there was more rock, it would spread out. Since it can't feel anything nearby, it drops babies.

Which works for DFWMAS because every new member gets a free frag of it.