So...observed something interesting this evening while checking over the Zoa's looking for signs of an irritant.
One lonely little feather duster looking thing on my big piece of rock. It's seriously TINY, about the diameter of a pencil. In fact, I'm noticing a bunch of little white tubes spread over my rocks...I saw a bunch of real small, hard white things on the bottom of the Zoa frag I got the other day. Perhaps they hitched in on that and spread to other places around the tank.
Anyone ever heard of anything that looks like a feather duster being predatory or generally bad for your tank?