zoa pests

[reefgirl189]

I noticed that a frag of zoas of mine have been closed for a few days so I had a closer inspection. What I found were some red bugs and they look exactly like the ones the OP is describing in this post I found:

http://www.michiganreefers.com/forum...-red-bugs.html

I first I thought these were flatworms (planaria) because of the fact that they are attacking the zoas, but they aren't. They are definitely not the well-known acropora red bugs either. I'm not quite sure what they are. It might also be helpful to know that I have not added any new coral in months, so they must have been around for awhile or possibly came in on a recent fish addition.

I did a short FW dip on the frag and about 20 of the little things fell off instantly. This morning however I noticed there were more on the frag.

Does anyone know what these are? How can I get rid of them? I've read up on the interceptor treatment but I want to be sure that it will actually kill these things before I jump to drastic measures.