Can one corals death cause a chain reaction?

[Aquattro]

Originally Posted by ScubaSteve

Simple answer: Yes. It's like sitting next to a sick person on a bus; you'll probably get sick too. Necrosis can be caused by a number things but in many cases it is "contagious" in that it can trigger other colonies.

In this case it sounds like unrelated species, so no, it would be like sitting beside a sick dog. You wouldn't likely catch what the dog has.