Brought a frogspawn a week or so ago. Dipped as normal few bits came off of it. I was sat watching my tank and noticed something move. Upon further inspection it was a dark in colour and a hole had appeared. I opened up my draw under the tank and when I closed it and it banged shut the thing deflated and the hole closed. After a few seconds it reopened. Today I removed the coral and got off whatever was on it and then redipped. Please can anyone identify what was actually on the coral.