White Nudibranch eating Colt Coral?

I suspect the white nudibranch is responsible for the downfall of the Colt, see http://www.seahorse-nw.com/Predators.html. Removed the one piece of the Colt left (as it's detached from the rock) and moved it to a depression in one of the rocks. As I understand it's difficult to get them to reattach as glue, etc doesn't work.