Are my palys killing my acan?

[Knotyet]

The acan closest to the palys havent been doing good for a while and seem like there starting to recede. The others are doing fine. All parameters are good. Could the

palys be releasing something? Kind of hard to see with the blues on sorry

 

[WIReefer]

Palys can be pretty aggressive, I would most likely move them apart.

 

[C. Eymann]

If they aren't touching they shouldn't be, I don't believe those are palythoa though, looks like zoanthus kurisho or zoanthus vietmanemisis.
Commonly misidentified in the trade, its same thing with zoanthids like utter chaos, blood sucker, salted agaves, people eaters etc etc, many incorrectly refer to these as palys.