Montipora white patches

[jhatfield]

Got these white patches on this montipora. Not sure if something is munching on it or if it’s a disease type thing. Only seems to be happening on this side of the colony. Towards the end of a fluconazole treatment which may have thrown something out of whack?

Alk 8.1
Ca. 395
Mg 1320
NO3 4

 

[Tahoe61]

Have you checked for Montipora Eating Nudibranch on the underside of the coral?

Is a near by coral stinging the Montipora?

 

[jhatfield]

Have you checked for Montipora Eating Nudibranch on the underside of the coral?

Is a near by coral stinging the Montipora?

Just googled monti eating nudibranch and it looks like the damage to the coral is similar. Undersides are difficult to see since it's growing downward. May just take it out and bayer dip it regardless.