The strangest thing happened to our hammer coral. We've had it for months and it was doing very well. This morning I topped off the tank with RO
and everything was fine. When I turned the lights on a little while ago, I noticed the entire top of the coral was missing and I found it on the sand in the back of our tank. It's still somewhat opened.
We have 2 clowns, a wrasse, a fire shrimp and some snails. They've never bothered the corals before so I'm not sure what happened. Any thoughts?