cyano

I looked over at my tank just a minute ago and was wondering what I am looking at.

If you look in the "mouth" of one of the heads you can see some white something in there sorry this is as clear of a close up as I can get. dare I say it almost looks as though my hammer is about to have a spawning event, but that is just a guess as I have never seen this before. they are individual white "polyps" in it's mouth and that seems to be the only head doing it so far. if anyone has seen anything like this or knows what is going on here that would be great.