Colt coral damaged

[cdemoss01]

Hello,
I came home today to my Colt coral completely flattened and seemingly a chunk had been taken out of its trunk. I circled the damage, is this die off or does it look like pest damage? It's been very very healthy for the past 3 or so weeks when I put it in the tank. Growing rapidly too.

 

[saltwaterfish.com Verified Sponsor]

It looks like it may have been ripped off the rock, if you could post a clear picture under white light that would help. What are your parameters at currently? and have you changed anything in the tank or added anything new?

 

[cdemoss01]

It looks like it may have been ripped off the rock, if you could post a clear picture under white light that would help. What are your parameters at currently? and have you changed anything in the tank or added anything new?

I added a mandarin goby, a large top crown snail and a hammer in yesterday.

Parameters are normal and all other corals in the tank are just fine

I'll try to get a better photo. It's still attached to the rock but not open whatsoever.

Survival chances? I dosed Restor with my skimmer off already

 

[cdemoss01]

Clearer photos @saltwaterfish.com