1/4" flat worm identification

[DopeCantWin]

I have a 1/4" grey flat worm crawling across one of my Acros. It doesn't seem to be hurting it. Crawling pretty fast. Has anybody seen this before?

 

[natesreef]

hmmm, any way we can get a pic of it? have you ever noticed little oval bite marks on your acros? if it is grey that may be okay. AEFW are usually brown

 

[DopeCantWin]

Definitely grey. I had AEFW about 6 months ago, but thought I had gotten rid of it. He's circling the bottom of the frag. I have a lot of SPS, don't see much in terms of bite marks. I think I'll wash him in some CoralRX just to be on the safe side. He seems a little translucent, which worries me. Definitely looks like a huge AEFW.

 

[DopeCantWin]

A CoralRX bath doesn't seem to bother him much. He got off the Acro, but is still crawling around in an overdose of it after over 10 minutes.

 

[Reef Bass]

There are some 30,000 species of flatworms, most of which don't eat acros. However, because you've had aefw, I'd be highly suspicious that it was one of those.

I agree CoralRx is fairly weak. I treated my aefw with Melafix Marine. Seems to upset the flatworms a whole lot more than CoralRx.