I just got this birdsnest colony last week. Well I dipped it with Bayer for 15 minutes at 10ml per cup, rinsed through three stages and put it in QT. Well I am looking at it and see something looking at me! I thought it was a stuck hermit crab or snail, so I pull the coral out and put it in a container to remove whatever it is. It was several snails embedded into the coral. Here are some pics. These things are burrowed into the skeleton of the coral.