Zombie myth. Another one that just won`t die. An animal that has evolved by sitting in one place and catching food that floats by is going to die if it catches a couple of big meals and over eats? I have purposely overfed individual heads of Sun and Dendro corals everyday to see if this is true. It is not. What can happen is, when the coral expels the waste, if there is not sufficient flow to carry the waste away, it can become wedged in between heads and rot and kill the heads from the outside. I have seen this happen a couple of times. It is also not true that all the heads of a colony need to be fed. If they are connected by tissue, they can feed off of each other. If they are individual heads then they need to be fed. I have fed certain heads of a colony and not fed others for months at a time to test this. All of my main colonies are reproducing. The 5 small colonies have sprung up within the last year alone. There are about 20 other babies like this, that I can see, in a 50G tank. In fact, if they continue to reproduce, I am going to have to start pulling them out.