Yes I was amazed to see how invisible the worms were on a wet coral (stealth mode). Once the flesh started to dry on the coral they seemed to show up as wet spots. Even then it was very difficult to see them or know for sure it wasn?t a wet spot. And yes the reef dip did knock them off but not as fast as fresh water did. I looked and looked at the pink millepora that Chuck is talking about and could not see one FW but when we let it dry we could see some as wet spots. Then when we dipped it into some fresh water WOW the worms were everywhere.