frogspwan

Hi folks, I am planning to add a Superman Mushroom, a small toadstool leather frag, and a small frogspawn frag to my 1 year old 32 gallon cube. I am 99% sure that I will be putting the mushroom on the sandbed next to the candycane and the lepto (closer to the zoa island). However, I have trouble...

I started noticing these little curly things on my rock and Frogspawn about a month ago. They have little strings that come out of them from time to time. I removed one and it had a hole burrowed into the skeleton. I feel like I may have damaged the coral doing this. Help? First picture is...