Problem with my leather coral

[BAMBIBAMBS]

Ahojte priatelia, mám problém s mojím koženým koralom. Dnes som si na nej všimol tmavý fľak, ktorý vyzerá ako modrina. Snažím sa urobiť lepšiu fotku, ale nedarí sa mi.
čo by to mohlo byť?

Translation:
Hello friends, I have a problem with my leather coral. Today I noticed a dark spot on her that looks like a bruise. I'm trying to take a better photo, but I can't.
what could it be

 

[cloak]

maybe a hermit crab posted up for a sec? wasn't hurting the coral, but the presence bruised it up? no worries. your going to see all kinds of stuff if your in for the long haul. GL

btw, those leather corals can be very temperamental sometimes. moody.

 

[BAMBIBAMBS]

maybe a hermit crab posted up for a sec? wasn't hurting the coral, but the presence bruised it up? no worries. your going to see all kinds of stuff if your in for the long haul. GL

I have no crabs in my tank at all I've already found out that these things are happening and it should be okay thank you very much