What does AEFW damage look like?

[asylumdown]

I've got one acro that's never done well, but I'm pretty sure it's an oregon tort, and they're known to grow really slowly, but I started noticing what looks like a mottling to the colour of it's tissue a few weeks ago, and I just noticed what looks like a patch of the encrusted base of a nearby coral that's missing polyps. I'm not sure if it was always like that and I just noticed, but I'm paranoid.

What does the damage from AEFW look like? If I break off the tort, should I be able to see them with my naked eye if I look at it close up?