I know those pictures stink, I'm working on better ones. I think it is too fine and small for aiptasia, I've been looking around and I think it may just be a bigger sort of fan worm. I found another one and it seems to come straight out of the rock with no visible tube. It looks alot like a...
There are a few things on my Live rock that I have no idea idea about.
One of them is a white mesh/net structure that is growing on the rock. Another is dark green fleshy umbrella shaped structures. There are photos of these things and others at My Page
If you know what these are or...