What's this? Good or bad?

[d-dzel]

I bought some tiki branches and this white thing came with it. It's been under the branch, but it seems to be slowly moving towards the top, but I mean VERY slowly. Also that brown thing in the back, is it a zoa? Theres a couple of these all around the branches

 

[spanko]

Brown thing is a button polyp. (Protopalythoa sp.)
White think is kind of blurry but looks to be a sponge or tunicate. Are you sure it is moving?

 

[d-dzel]

Yeah, it's slowly moving or it seems like it. When I got it, it was a little bit lower in the branch, not it seems to be reaching the top. I'd say it moved maybe 1/4" perhaps.

 

[d-dzel]

the center is all white but the edges are kinda white/transparent and it seems to have like "snow flake" patterns

 

[renogaw]

ugh, that pic makes me think different things.
1) id think it was a sponge, but you say it moves
2) it looks like a skirted limpet with the snout out the middle, but they dont hug the rocks like that pic does
3) i'd say it was a polyclad flatworm, but they don't have snouts in their middles...
any way to get a clearer pic? try using the "self portrait" setting on the camera without the flash

 

[d-dzel]

Ok, maybe my eyes were deceiving me but it seems to not be moving anymore. I'll try to get a better pic, or maybe take out the rock and take a quick picture of it, or something

 

[renogaw]

anything?

 

[bang guy]

There are several Sponge Species that can move. This is one of them.