What's up guys. I was fragging some coral today and noticed these at the base of my one of my corals. None of the branches have bite marks. I inspected the rest of my acros and didn't see any more. I removed the colony, fragged the entire base (pictured) off. White marks on the base are from me scraping the base, outside the tank with a dental pick. I scraped everything that was encrusting off the rock. I dipped the top of the colony not affected in Bayer and Revive. Nothing came off in the dip. Any other suggestions?? Thanks in advance.