What's wrong with this coral

[TD43]

It was added to the tank just a few days ago and isn't looking good. Can anyone help tell me what this white is and what may be wrong? Thanks.

 

[cloak]

Those white things your seeing are Mesenterial Filaments. Do you have any other corals nearby? Something is probably irritating the coral causing it to expel these.

 

[TD43]

Thanks, there is a small (2") mushroom a few inches below it and a group of small polyps (pipe organ I think) growing from the live rock about 6 inches from that side of it.

Would those irritate it?

 

[cloak]

They might... Are you running carbon at all? Sometimes this will help. Being that nothing is in contact with the coral though, seeing these is not really a big deal IMO. They could go away in a matter of hours really, but definitely keep your eye on the coral for the next few days or so. GL.

 

[SLOreefer805]

Cloak, good call! It appears the coral is irritated or being stung.

 

[chilli_reef]

Acans, favias, micros... will also do this if you brush against them yo hard or handle them to roughly.