acro eating flatworms?

[purplesprite]

this morning when the light came on i noticed my acro sliming.looking closer i noticed something had eaten a hole in it.i cant see anything like parisites that i can see that is.the only other thing thats irregular is that it has a few of its polyps plugged up.ive included a picture hopefully some one can help me out.thanks
-jj

[::pete::]

Brian (greenmako) has a mantis burrowing in an acro before.

[akm]

I don't think the acro FW actually eat a hole in the coral, I think they just eat eat the tissue. Some other things may eat a hole in it though.

[purplesprite]

yea sorry i wasnt exactly clear. the tissue was eaten off in a circle shape,like a hole.