Chalice Coral Issues -

[Michael Hull]

I've been keeping an eye on this.. The front edge looks like a bite was taken out of it, and then the back edge started peeling away. Seems to maybe have stabilized. Could an Alk swing cause this? Alk currently around 9.7 dkh.

Other daylight shots for reference and comment on apparent health. This was early morning so feeders still out on others.

 

[Flippers4pups]

Its recession looks similar to a sting from a neighboring coral or pest attack from a Eunice worm.