So after 10 years of dreaming and 3 months of cycling my tank I buy my first coral colony- (some zoos) and after about two weeks one night I notice these things are all over it!! At first I was excited and now I am terrified after looking for info and reading all this. Thanks for the info though. Luckily I only have one colony and no other corals yet. There are probably about 7-8 visible adults. I guess I might try the hot water trick.