Brittle Star?

[NanaReefer]

Ever have a Brittle Star mess with your corals? Not eating but causing tissue recession by irritating them.

 

[Tristan]

Yeah. I have one in my 10g at it causes my octospawn to recede.

 

[NanaReefer]

Thank you for posting @Tristan [emoji2] Knew mine was the reason for my BGM Chalice's tissue recession.
I've since cut away the dead area and moved it. Hopefully it'll survive.