whats wrong with my coral plate

I just bought this coral plate two days ago.
Last night i moved it because a snail shell
Was laying on it i tried not to touch it
i am not sure though. can someone plz tell
me whats going on and if i did by chance touch it
What should i do

 

We need some more info. Parameters, lighting, flow, how old tank etc.

 

How did it look when you got bought it? Right now, it looks like most of the tissue has receded. With plate corals (Fungia), I have read that when they die they will often times produce Anthocauli (essentially baby Fungia), so whatever you do, don't remove it from your tank.

A couple things, what lighting do you have it under? They do not like bright lighting IMO. Second, they are usually on sand or a softer substrate. They don't seem to do as well on rockwork (or in this case pebbles). Third, when you placed it in the tank, did you put it in sideways to confirm it did not have any air trapped under it? This can cause serious issues with it if it does. Fourth, moving it should not really be a problem. I have had to move mine a few times, even from one tank to another and it doesn't seem to mind. Lastly, was it from a LFS or shipped? I have never really acclimated corals from the LFS, but I do when they are shipped. Did you dip it in anything before placing it in the tank?

 

Touching it shouldn't hurt it as long as your not putting a ridiculous amount of force on it. I toss mine around a lot by hand when it gets in the way of new coral placement. Some plates can get hurt from being removed from the water while expanded out. The water weight inside the tissue can put strain on the skeletal/tissue attachments, but its not that common because they usually expel the water pretty quickly once being handled.

Check your parameters, more likely water problems. It looks like there's some skeleton showing on the back side. If it has any kind of necrosis forming after just a day or two then there is likely a water problem or something happened during acclimation.

 

the culprit could very well be in the same picture. iv heard peppermints bothering corals

 

My light is solarmax HE T5 230.
I bought it locally the skeletons
On the back side were there when i purchased it
My tank has been set up for about
3 yrs. However we just purchased it a few
Months ago so since then we have added the new light purchased a yellow tang a hammer head coral peppermint shrimp crabs and snails the same day we got the coral plate we added the protein skimmer. I woke up this morning and saw it that way so I immediately tested it also checked the salinity and specific gravity. The nitrate was between 20 and 40 everything else was good. i did not tilt to make sure there was no air in it.... should i do that now and if so how so i don't hurt it. Hope this is enough info for someone to help me thanks for all the comments

 

Haha first thing I was thinking to.

 

This is a Long Tentacle (Heliofungia) correct? Care should be the same either way. The only problems I see off the bat are the substrate (should be sandy) and possibly bothered by the Peppermint Shrimp or maybe some of your crabs. I can tell you that my shrimp bother my Orange Plate (Fungia) all the time, and it really doesn't seem to care. It will retract a little, then once they leave it expands again within a few minutes.

 

you mention crabs? few, if none are reef safe.... my 2 cents

 

we wanted to change the bottom to live sand but was told that it may disturb our tank and possible kill everything.we had to buy the peppermint shrimp because the guy who owned it before us had aptasha i think that's how u spell it lol anyways the tank was over ran by it we got 3 of them and now it seems to be all gone.i just looked at it and it seems to be opening up.. ill post a pic of it and maybe one of u guys can tell me if it looks okay