Latest Shots of Acropora Killer - Help Me ID

The original creature that was damaging my acro lokani came back. It seems to advance very quickly on the coral flesh and destroy whatever it's attached to. This time, I was able to peel it carefully off the surface of the acro and take a 16x photo with a magnifying glass. After photographing it, I rubbed it between my fingers to get a feel for the texture. After rolling it around, I was basically left with what felt like very fine sand. It's similar to a sponge in a way. Hopefully, these photos will help.

 

Hi all, anyone have any idea what this stuff might be? I pulled it off the acro, and it's gone away as usual. I suspect it'll be back at some point, however.

 

Possibly a flatworm

 

I took this off lionfish lair. Closest thing I could find.

 

Hmmm, the problem is that it doesn't really seem to move. It's more like it's growing on the coral. Until you rip it off, then it goes away, along with the damage. And the body is really fragile.

 

Not sure, my suggestion is do some research and take pics of what you find on the coral.

 

The best pics I could get of the material still before removal from the coral can be found earlier in the thread. I've done significant web research, including contacting some experts in the field, but so far I've come up short. The unwanted creature/thing/substance always emanates from the same spot below the coral, so perhaps the best thing to do is simply plug up that area with epoxy putty.