I have to say Ive never heard of that happening.
Im tagging along though...
I dont think copepods can eat coral. What probably happend is the coral died and the pods came to eat the decaying tissue.
I've never heard of that before. Can we get a photo of the coral?
Unless you actually saw it happening, I would be willing to bet the copepods got to the scene after the coral receded from its skeleton.