Does anyone know what this could be on my Lobophyllia?

[Sweetpeaches]

I just noticed this on my Lobophyllia today. The tissue is indented where it is. Thanks.

 

[Barrett]

Mine does that all the time and is back to normal in a few days

 

[C. Eymann]

mesenterial filaments

 

[Barrett]

mesenterial filaments

That’s what I was looking for, couldn’t remember the name

 

[Sweetpeaches]

mesenterial filaments

I think this is it; I never knew these could look like ribbons. I'm relieved, thank you.

 

[Crisperu]

I just noticed this on my Lobophyllia today. The tissue is indented where it is. Thanks.

Same happened to my lobo this weekend. Next day, 20% of the inside part of the coral (close to mouth) is gone.......